MEDICAL POLICY

POLICY
RELATED POLICIES
POLICY GUIDELINES
DESCRIPTION
SCOPE
BENEFIT APPLICATION
RATIONALE
REFERENCES
CODING
APPENDIX
HISTORY

Spinal Cord Stimulation

Number 7.01.546

Effective Date April 16, 2013

Revision Date(s) 04/08/13

Replaces 7.01.25

Policy

Spinal cord stimulation may be considered medically necessary for the treatment of severe and chronic pain of the trunk or limbs that is refractory to all other therapies when ALL of the following conditions are met:

  • Prior lumbar spine surgery in the affected area at least 6 months prior; and
  • Pain being treated is in a defined lumbosacral nerve-root distribution; and
  • No numbness in the affected nerve root distribution; and
  • Leg pain is greater than back pain; and
  • Member has obtained clearance by a licensed psychologist/psychiatrist; and
  • Demonstration of at least 50% pain relief days with a temporarily implanted electrode and preceding permanent implantation by at least 3 days.

Spinal cord stimulation is considered investigational as a treatment of:

  • Central deafferentation pain (related to CNS damage from a stroke or spinal cord injury).
  • Failed Back Surgery Syndrome not meeting criteria above.
  • Axial back pain.
  • Peripheral neuropathy.
  • Critical limb ischemia as a technique to forestall amputation.
  • Refractory angina pectoris.
  • Complex regional pain syndrome.
  • Post herpetic neuralgia.
  • Occipital neuralgia.
  • Failed cervical or thoracic surgery.

Related Policies

1.01.507

Electrical Stimulation Devices

7.01.20

Vagus Nerve Stimulation

7.01.63

Deep Brain Stimulation

7.01.125

Occipital Nerve Stimulation

8.03.01

Functional Neuromuscular Electrical Stimulation

Policy Guidelines

N/A

Description

Spinal cord stimulation (SCS) delivers low voltage electrical stimulation to the dorsal columns of the spinal cord to block the sensation of pain. Spinal cord stimulation devices either have a power source (battery) that is surgically implanted or else the power source is worn externally and only the radiofrequency receiver is implanted.

Spinal cord stimulation (SCS) devices consist of several components: 1) the lead that delivers the electrical stimulation to the spinal cord; 2) an extension wire that conducts the electrical stimulation from the power source to the lead; and 3) a power source that generates the electrical stimulation. The lead may incorporate from 4 to 8 electrodes, with 8 electrodes more commonly used for complex pain patterns, such as bilateral pain or pain extending from the limbs to the trunk. There are two basic types of power source. In one type, the power source (battery) can be surgically implanted. In the other, a radiofrequency receiver is implanted, and the power source is worn externally with an antenna over the receiver. Totally implantable systems are most commonly used.

Spinal cord stimulation has been used in a wide variety of chronic refractory pain conditions, including pain associated with cancer, failed back pain syndromes, arachnoiditis, and complex regional pain syndrome (i.e., chronic reflex sympathetic dystrophy). There has also been interest in spinal cord stimulation as a treatment of critical limb ischemia, primarily in patients who are poor candidates for revascularization and in patients with refractory chest pain. The neurophysiology of pain relief after spinal cord stimulation is uncertain but may be related to either activation of an inhibitory system or blockage of facilitative circuits.

The patient’s pain distribution pattern dictates at what level in the spinal cord the stimulation lead is placed. The pain pattern may influence the type of device used; for example, a lead with 8 electrodes may be selected for those with complex pain patterns or bilateral pain. Implantation of the spinal cord stimulator is typically a 2-step process. Initially, the electrode is temporarily implanted in the epidural space, allowing a trial period of stimulation. Once treatment effectiveness is confirmed (defined as at least 50% reduction in pain), the electrodes and radio-receiver/transducer are permanently implanted. Successful spinal cord stimulation may require extensive programming of the neurostimulators to identify the optimal electrode combinations and stimulation channels. Computer-controlled programs are often used to assist the physician in studying the millions of programming options when complex systems are used.

Regulatory Status

A number of total implanted spinal cord stimulators have received U.S. Food and Drug Administration (FDA) premarket approval (PMA). The Cordis programmable neurostimulator from Cordis, Corp. was approved in 1981, and the Itrel(R) manufactured by Medtronic was approved in 1984. In April 2004, Advanced Bionics received PMA for its Precision Spinal Cord Stimulator as an aid in management of chronic, intractable trunk and limb pain. All are fully implanted devices.

Scope

Medical policies are systematically developed guidelines that serve as a resource for Company staff when determining coverage for specific medical procedures, drugs or devices. Coverage for medical services is subject to the limits and conditions of the member benefit plan. Members and their providers should consult the member benefit booklet or contact a customer service representative to determine whether there are any benefit limitations applicable to this service or supply.

Benefit Application

N/A

Rationale

Chronic Trunk or Limb Pain

In 2009, a systematic review of randomized controlled trials (RCTs) and observational studies of spinal cord stimulation (SCS) in post-lumbar surgery syndrome was undertaken by Frey et al. Primary outcome measures were short term (<1 year) and long-term (>1 year) pain relief, and secondary measures were improvement in functional status, psychological status, return to work, and reduction in opioid intake. The authors caution that the paucity and heterogeneity of the literature are limitations of the review. Using U.S Preventive Services Task Force quality ratings, the authors found Level II-1 evidence (from well-designed controlled trials without randomization) or II-2 evidence (from well-designed cohort or case-control analytic studies, preferably from more than one center or research group) for clinical use of the treatment on a long term-basis.

Also in 2009, Simpson and colleagues performed a systematic review of the literature to obtain clinical and cost-effectiveness data for SCS in adults with chronic neuropathic or ischemic pain with inadequate response to medical or surgical treatment other than SCS. Trials for failed back surgery syndrome and complex regional pain syndrome type I suggested that SCS was more effective than conventional medical management (CMM) or reoperation in reducing pain. The authors concluded “evidence from CLI [critical limb ischaemia] trials suggests that SCS was more effective than CMM in reducing the use of analgesics up to 6 months, but not at 18 months. Although there was significant pain relief achieved, there was no significant difference between groups in terms of pain relief, for SCS versus CMM or analgesics treatment. SCS had similar limb survival rates to CMM, or analgesics treatment, or prostaglandin E1. SCS and CMM were similarly effective in improving HRQoL (health-related quality of life).”

Representative RCTs on spinal cord stimulation for treating pain are described below:

A multicenter randomized trial published in 2007 by Kumar and colleagues (the PROCESS study) compared SCS (plus conventional medical management) with medical management alone in 100 patients with failed back surgery syndrome. Leg pain relief (>50%) at 6 months was observed in 24 (48%) SCS-treated patients and in 4 (9%) controls, with an average leg pain visual analogue scale (VAS) score of 40 in the SCS group and 67 in the conventional management control group. Between 6 and 12 months, 5 (10%) patients in the SCS group and 32 (73%) patients in the control group crossed over to the other condition. Of the 84 patients who were implanted with a stimulator over the 12 months of the study, 27 (32%) experienced device-related complications.

In 2008, Kemler and colleagues reported 5-year outcomes from a randomized trial of 54 patients with complex regional pain syndrome (CRPS). Twenty-four of the 36 patients assigned to SCS and physical therapy were implanted with a permanent stimulator after successful test stimulation; 18 patients were assigned to physical therapy alone. Five-year follow-up showed a 2.5-cm change in VAS pain score in the SCS group (n=20) and a 1.0-cm change for the control group (n=13). Pain relief at 5 years was not significantly different between the groups; 19 (95%) patients reported that for the same result they would undergo the treatment again. Ten (42%) patients underwent reoperation due to complications.

Critical Limb Ischemia

Critical limb ischemia is described as pain at rest or the presence of ischemic limb lesions. If the patient is not a suitable candidate for limb revascularization (typically due to insufficient distal runoff), it is estimated that amputation will be required in 60–80% of these patients within 1 year. SCS has been investigated in this small subset of patients as a technique to relieve pain and decrease the incidence of amputation.

A systematic review from the Cochrane group on the use of SCS in peripheral vascular diseases was updated in 2005. Included were 6 European studies of generally good quality with a total of 444 patients. None of the studies were blinded. At 12 months’ follow-up, limb salvage improved by 11% compared with any form of conservative treatment with a number needed to treat (NNT) of 9. The SCS patients required significantly fewer analgesics, and more patients reached Fontaine stage II than in the conservative group. There was no difference in ulcer healing. The overall risk of complications or additional SCS treatment was 17%, with a number needed to harm (NNH) of 6. The report concludes that there is evidence to favor SCS over standard conservative treatment to improve salvage and clinical situation in patients with critical leg ischemia but that “the benefits of SCS against the possible harm of relatively mild complications and costs must be considered.” Analysis of data and cost calculations from a randomized trial with 120 patients previously published in 1999 by Klomp and colleagues showed that the difference in amputation rate at 12 months when SCS was provided in addition to best medical care was no longer present at 24 months, and there was no difference in survival rate at 24 months.

In 2009, Klomp and colleagues published a meta-analysis of 5 randomized trials on spinal cord stimulation for prevention of amputations in patients with critical limb ischemia. They found insufficient evidence that SCS is more efficacious than best medical treatment alone. They also conducted additional analyses of data from their 1999 RCT to identify factors associated with a better or worse prognosis. They found that patients with ischemic skin lesions had a higher risk of amputation compared to patients with other risk factors. There were no significant interactions between this or any other prognostic factor. The analyses did not identify any subgroup of patients who might benefit from SCS.

Conclusions

A number of small RCTs of SCS versus usual care have been completed on patients with critical limb ischemia. These studies report that SCS reduces pain, but the impact on limb amputations is less certain. Some studies have shown a small improvement in amputation rates, but others have not. This evidence is not sufficient to determine whether SCS improves outcomes for patients with critical limb ischemia.

Refractory Angina Pectoris

Spinal cord stimulation has been used for treatment of refractory angina in Europe for 20 years, and much of the literature on SCS comes from European centers. Several systematic reviews have recently been published. In 2009, Taylor et al. included 7 RCTs in a systematic review of SCS in the treatment of refractory angina. The authors noted that trials were small and varied considerably in quality. They concluded that “compared to a ‘no stimulation’ control, there was some evidence of improvement in all outcomes following SCS implantation with significant gains observed in pooled exercise capacity and health related quality of life”; however, “further high quality RCT and cost effectiveness evidence is needed before SCS can be accepted as a routine treatment for refractory angina.”

The 2009 Simpson et al. systematic review, described above in the section of the Rationale on pain, summarized the evidence for SCS for refractory angina as follows: “The authors summarized their review of the evidence for SCS for refractory angina as follows: ‘Evidence from angina trials suggested that SCS was more effective than No SCS or Inactive stimulator for nitrate consumption, frequency of angina attacks, exercise duration and time to angina at short term (6–8 weeks). SCS was also more effective than percutaneous myocardial revascularization (PMR) at 3 months, not at 12 months for time to angina. Health-related Quality of Life (HRQoL) was more improved by SCS than No SCS at 6–8 weeks. There was no difference between SCS and Inactive stimulator in terms of pain relief. SCS and CABG [coronary artery bypass graft] had similar results for short-acting nitrates and frequency of angina attacks. There was no difference in effectiveness of SCS and PMR for change in angina class or exercise duration. SCS did not differ from CABG or PMR or Inactive stimulator in terms of HRQoL. The SCS was less effective than CABG in reducing consumption of long-acting nitrates. SCS was less effective than CABG in increasing maximum workload capacity, although the SCS device was switched off during this comparison.’”

In 2008, a systematic review of the literature based on the Swedish Council on Technology Assessment in Health Care report on spinal cord stimulation in severe angina pectoris was published. Seven controlled studies (5 of them randomized), 2 follow-up reports, and a preliminary report, as well as 2 non-randomized studies determined to be of medium-to-high quality were included in the review. The largest RCT included 104 subjects and compared SCS and coronary artery bypass graft (CABG) in patients accepted for CABG and who were considered to have only symptomatic indication (i.e., no prognostic benefit) for CABG, according to the American College of Cardiology/American Heart Association guidelines, to run an increased risk of surgical complications, and to be unsuitable for percutaneous transluminal coronary angioplasty. Between-group differences on nitrate consumption, anginal attack frequency, and self-estimated treatment effect were not statistically significant at the 6-month follow-up. At the 5-year follow-up, significantly fewer patients in the CABG group were taking long-acting nitrates, and between-group differences on quality of life and mortality were not significant. Other studies included in the Swedish systematic review include one by McNab et al. from 2006, which compared SCS and PMR in a study with 68 subjects. Thirty subjects in each group completed a 12-month follow-up, and differences on mean total exercise time and mean time to angina were not significant. Eleven in the SCS group and 10 in the PMR group had no angina during exercise. The remaining RCTs included in the systematic review included 25 or fewer subjects.

Several RCTs were published after the systematic review but had limitations, such as small sample size and short follow-up. In 2012, Zipes and colleagues published an industry-sponsored, single-blind multicenter trial with sites in the United States and Canada. This study, however, was terminated early. The Data and Safety monitoring board recommended that the study be terminated for futility after the interim analysis. A total of 118 patients with severe angina despite maximal medical treatment were enrolled in the study. Of these, 71 patients (60%) underwent SCS implantation with the Intrel III neurostimulator (Medtronic). The remaining 47 patients were found not to meet eligibility criteria post-enrollment or there were other issues e.g., withdrawal of consent. The investigators had originally been planning to randomize up to 310 patients but enrollment was slow. Implantation was successful in 68 patients; this group was randomized to high stimulation (n=32) or a low stimulation control (n=36). The low stimulation control was designed so that patients would feel paresthesia but the effect of stimulation would be sub-therapeutic. The primary outcome was a composite variable of major adverse cardiac events (MACE), which included death from any cause, acute myocardial infarction (MI), or revascularization through 6 months. Fifty-eight of 68 patients (85%) contributed data to the 6 month analysis; analysis was by intention to treat. The proportion of patients experiencing MACE at 6 months did not differ significantly between groups (12.6% in the high stimulation group and 14.6% in the low st8imulation group; p=0.81). The sample size of this study was small and it may have been underpowered for clinically meaningful differences.

In 2008, Bondesson and colleagues published a non-randomized study comparing SCS with enhanced external counterpulsation (EECP). A total of 153 patients with refractory angina pectoris were identified, and transcutaneous electrical nerve stimulation (TENS) was used to test tolerance to electrical stimulation (except those contraindicated by unipolar pacemaker). Forty-four patients had total symptom relief and were implanted with SCS. The 79 nonresponders underwent EECP. A control group consisted of 30 patients for whom SCS or EECP were contraindicated or who were unwilling to have either treatment. Outcome measures were Canadian Cardiovascular Society Class (CCS-class) and glyceryl trinitrate (GTN) usage. At 12 months, EECP reduced CCS class from class 3 (marked limitation in activity, angina may occur after walking one block) to class 2 (slight limitation, angina may occur after walking 2 blocks), and 23% of the EECP group improved by 2 CCS classes. SCS reduced angina less, but the reduction was reported to be clinically significant. Of study patients who used GTN (all but 7%), decrease in weekly use was 67% of patients in the EECP group and 76% in the SCS group. A limitation of the study was there was the potential for a placebo effect because patients were not randomly assigned to treatment groups and could not be blinded to the treatment they received.

A small RCT from Italy randomly assigned 25 patients to 1 of 3 treatment groups: SCS with standard levels of stimulation (n=10), SCS with low-level stimulation (75% to 80% of the sensory threshold) (n=7), or very low intensity SCS (n=8). Thus, patients in groups 2 and 3 were unable to feel sensation during stimulation. After a protocol adjustment at 1 month, patients in the very low intensity group were re-randomized to one of the other groups after which there were 13 patients in the standard stimulation group and 12 patients in the low-level stimulation group. At the 3-month follow-up (2 months after re-randomization), there were statistically significant between-group differences in 1 of 12 outcome variables. There were a median of 22 angina episodes in the standard stimulation group and 10 in the low-level stimulation group (p=0.002). Non-significant variables included use of nitroglycerin, quality of life (VAS), Canadian Cardiovascular Society angina class, exercise-induced angina, and 5 sub-scales of the Seattle angina questionnaire.

Conclusions

Numerous small RCTs have evaluated SCS as a treatment for refractory angina. While some studies have reported benefit, the majority have not. In two of the larger, more recent RCTs that enrolled more than 100 patients, there was no benefit on the primary outcomes. Overall, this evidence is mixed and not sufficient to allow conclusions on whether health outcomes are improved.

Potential Adverse Effects

Whereas RCTs are useful for evaluating efficacy, observational studies can provide data on the likelihood of potential complications. In 2010, Mekhail and colleagues published a retrospective review of 707 patients treated with SCS between 2000 and 2005. The patients’ diagnoses included CRPS (n=345, 49%), failed back surgery syndrome (n=235, 33%), peripheral vascular disease (n=20, 3%), visceral pain in the chest, abdomen or pelvis (n=37, 5%), and peripheral neuropathy (n=70, 10%). There was a mean follow-up of 3 years (range 3 months to 7 years). A total of 527 of the 707 (36%) eventually underwent permanent implantation of an SCS device. Hardware-related complications included lead migration in 119 of 527 (23%) cases, lead connection failure in 50 (9.5%) cases, and lead break in 33 (6%) cases. Revisions or replacements were done to correct the hardware problems. The authors noted that rates of hardware failure have decreased in recent years due to advances in SCS technology. Documented infection occurred in 32 of 527 (6%) patients with implants; there were 22 cases of deep infection, and 18 patients had documented abscesses. There was not a significant difference in the infection rate by diagnosis. All cases of infection were managed by device removal.

In 2012, Lanza and colleagues reviewed observational studies on SCS in patients with refractory angina pectoris. The authors identified 16 studies with a total of 1204 patients (although they noted that patients may have been included in more than one report). The most frequently reported complications were lead issues i.e., electrode dislodgement or fracture requiring repositioning, or internal programmable generator (IPG) failure during substitution. Lead issues were reported by 10 studies with a total of 450 patients. In these studies, 55 cases of lead or IPG failure were reported. No fatalities related to SCS treatment were reported.

Ongoing Clinical Trials

Spinal Cord Stimulation With Precision SCS System Versus Reoperation for Failed Back Surgery Syndrome [FBSS] (EVIDENCE trial) (NCT01036529): This is an open-label RCT comparing the effectiveness and cost-effectiveness of spinal cord stimulation to reoperation for treating pain in patients with FBSS. Eligibility includes leg pain for at least 6 months, with or without back pain, following lumbosacral surgery. The primary endpoints are the proportion of participants with at least 50% leg pain relief at 6 and 24 months after enrollment. The study is sponsored by Boston Scientific; it is estimated that the final data collection date will be March 2014.

Effect of Spinal Cord Stimulation in Painful Diabetic Polyneuropathy (PDP) (NCT01162993): This RCT compared SCS treatment to usual care (optimal medication treatment) in patients with painful diabetic polyneuropathy in the lower limbs. Eligibility includes pain for more than 12 months and previous unsuccessful medication treatment. The primary outcome is pain intensity, and secondary endpoints include quality of life and blood glucose control. The study is sponsored by Maastricht University in the Netherlands. The expected study completion date is December 2012.

Spinal Cord Stimulation For Heart Failure (NCT01362725): This is an observational study that will include approximately 20 patients with heart failure. Patients will be followed for 6 months. Primary outcomes include intra- and post-procedure adverse events, exercise capacity and functional ability, left ventricular structure and function, inflammatory condition and quality of life.

Practice Guidelines and Position Statements

In 2012, the Special Interest Group of the Canadian Pain Society published a guideline on interventions for neuropathic pain. The guideline stated that clinicians should consider offering a trial of SCS to patients with failed back syndrome and complex regional pain syndrome who are not surgical candidates and who have failed conservative evidence-based treatments. (Recommendation based on good evidence with moderate certainty, Grade B strength of recommendation). The guideline also stated that clinicians should consider offering a trial of SCS to patients with traumatic neuropathy and brachial plexopathy who are not surgical candidates and have failed conservative evidence-based treatments. (Recommendation based on fair evidence with moderate certainty, Grade C strength of recommendation).

In 2009, the American Society of Interventional Pain Physicians updated their evidence-based guidelines for interventional techniques in the management of chronic spinal pain. The guideline states that, based on Guyatt et al.’s (2006) criteria, the recommendation for spinal cord stimulation is “1B or 1C/strong recommendation for clinical use on a long-term basis” (1B is defined as ‘strong recommendation, moderate quality evidence’ and 1C as ‘strong recommendation, low-quality or very low-quality evidence’).

In October 2008, the National Institute for Health and Clinical Excellence (NICE) issued a guideline on spinal cord stimulation for chronic pain of neuropathic or ischemic origin. The guideline stated that SCS is recommended as a treatment option for adults with chronic pain of neuropathic origin who continue to experience chronic pain (measuring at least 50 mm on a 0–100 mm VAS) for at least 6 months despite appropriate conventional medical management, and who have had a successful trial of stimulation as part of an assessment by a specialist team.

An evidence-based guideline from the American Society of Interventional Pain Physicians found the evidence for SCS in failed back surgery syndrome and complex regional pain syndrome strong for short-term relief and moderate for long-term relief. Reported complications with SCS ranged from infection, hematoma, nerve damage, lack of appropriate paresthesia coverage, paralysis, nerve injury, and death.

The European Society of Cardiology guidelines on management of stable angina pectoris do not include SCS in its list of conclusions and recommendations but state that transcutaneous electrical stimulation and SCS are “well established methods used for the management of refractory angina.” They also point out that the available clinical trials are small and long-term effects are unknown.

Medicare National Coverage

According to Medicare policy, the implantation of central nervous system stimulators may be covered as therapies for the relief of chronic intractable pain, subject to the following conditions:

  • The implantation of the stimulator is used only as a late resort (if not a last resort) for patients with chronic intractable pain;
  • With respect to item a, other treatment modalities (pharmacological, surgical, physical, or psychological therapies) have been tried and did not prove satisfactory, or are judged to be unsuitable or contraindicated for the given patient;
  • Patients have undergone careful screening, evaluation, and diagnosis by a multidisciplinary team prior to implantation. (Such screening must include psychological, as well as physical evaluation.);
  • All the facilities, equipment, and professional and support personnel required for the proper diagnosis, treatment training, and follow-up of the patient (including that required to satisfy item c) must be available; and
  • Demonstration of pain relief with a temporarily implanted electrode precedes permanent implantation.

2012 Update

Hayes, Inc. issued a Medical Directory Technology Report on spinal cord stimulation in 2012. They found three randomized controlled or comparative trials for failed back surgery syndrome and only one randomized trial for complex regional pain syndrome that met their study selection criteria. All four of these studies evaluated SCS for neuropathic pain. Hayes found that studies of other applications of SCS, other than for neuropathic pain, were either too small to meet selection criteria or did not include a control or comparison group. Of the studies evaluating neuropathic pain, the quality of the studies was judged to be low to moderate. None of the studies included a placebo control. The complication rate from SCS was 24% to 42% of patients. They concluded that the low number of RCTs, the small sample size of the trials and many single-site studies made it difficult to evaluate the generalizability of the results and substantial uncertainty remains about the impact on health outcomes.

Turner and colleagues sought to answer questions concerning the effectiveness and risks of SCS for chronic back and leg pain after spine surgery, also referred to as failed back surgery syndrome. This prospective, population-based controlled cohort study evaluated outcomes of workers' compensation recipients with FBSS who received at least a trial of SCS (SCS group, n=51) versus those who (1) were evaluated at a multidisciplinary pain clinic and did not receive SCS (Pain Clinic, n=39) or (2) received neither SCS nor pain clinic evaluation (Usual Care, n=68). (There was an enrollment goal of 50 patients in each group but the most common reason for exclusion was leg pain not worse than back pain). Patients completed measures of pain, function, medication use, and work status at baseline and 6, 12, and 24 months later. They also examined work time loss compensation over 24 months. Few (<10%) patients in any group achieved success at any follow-up on the composite primary outcome encompassing less than daily opioid use and improvement in leg pain and function. At 6 months, the SCS group showed modestly greater improvement in leg pain and function, but with higher rates of daily opioid use. These differences disappeared by 12 months. Patients who received a permanent spinal cord stimulator did not differ from patients who received some pain clinic treatment on the primary outcome at any follow-up (<10% successful in each group at each follow-up) and 19% had them removed within 18 months. Both trial and permanent SCS were associated with adverse events. They found no evidence for greater effectiveness of SCS versus alternative treatments in this patient population after 6 months.

In 2010, Washington State Health Care Authority (HCA) Health Technology Clinical Committee contracted with Spectrum Research, Inc. to provide a technology assessment report on spinal cord stimulation. After peer review, public comments and committee discussion, HCA had the following findings: Current best evidence is available primarily from four trials on 375 patients; which are rated at a Level 1 or 2 (good quality), which is a better level of evidence than some interventions. However, total patient sample size is small, comparators were weak or inappropriate, reported outcomes are mostly subjective and not consistently reported, industry funding and management may have an impact, and no trial included a sham stimulation/procedure arm. The overall body of evidence was inconsistent, with several trials showing benefits on some outcomes at generally shorter follow up periods and others showing no difference. The committee agreed that safety was a significant factor: the number of trial reported complications ranged from 8 to 100%. Device related complication requiring revision ranged from 25% to 38% of patients in short term and 42% to 60% in up to 5 years (not including 54% of patients undergoing pulse generator replacements due to battery life). SCS device related complications can be serious and include dural punctures, amplitude by bodily movements; paresthesia in other body parts, pain, disturbed urination, lead fracture, loss of effect, infection. Given the serious limitations of the studies, the committee agreed that, at best, weak evidence exists that SCS may provide temporary improvement of pain in some patients, but there is no evidence of mid or long term pain improvement. The committee concluded that the current evidence on spinal cord stimulation demonstrates that there isn’t sufficient evidence to cover the use of spinal cord stimulation for chronic neuropathic pain.

Summary

In patients with refractory trunk or limb pain, the available evidence is mixed and limited by heterogeneity. Systematic reviews have found some support for the use of spinal cord stimulation to treat refractory trunk or limb pain, with the strongest evidence supporting a finding of decreased pain following failed lumbar surgery. Patients who have failed all other treatment modalities have very limited options. Therefore, spinal cord stimulation for chronic refractory pain of the trunk or limbs may be considered medically necessary in a specific subset of patients when criteria are met.

For patients with critical limb ischemia, the available evidence supports a decrease in pain with a short-term decrease in limb amputations following treatment with SCS. Complications include the need for operative repositioning procedures. There is a lack of evidence for improvement in pain and limb salvage at longer endpoints, which is a crucial factor when considering a permanently implanted device. Thus, spinal cord stimulation for critical limb ischemia to reduce limb amputation is considered investigational.

For patients with refractory angina pectoris, the available evidence consists of case series and small controlled trials with methodologic limitations and limited follow-up and is not sufficient to conclude that SCS improves health outcomes. Thus, spinal cord stimulation for patients with refractory angina pectoris is considered investigational.

References

  1. Frey ME, Manchikanti L, Benyamin RM et al. Spinal cord stimulation for patients with failed back surgery syndrome: a systematic review. Pain Physician 2009; 12(2):379-97.
  2. Simpson EL, Duenas A, Holmes MW et al. Spinal cord stimulation for chronic pain of neuropathic or ischaemic origin: systematic review and economic evaluation. Health Technol Assess 2009 13(17):1-154.
  3. Kumar K, Taylor RS, Jacques L et al. Spinal cord stimulation versus conventional medical management for neuropathic pain: a multicentre randomized controlled trial in patients with failed back surgery syndrome. Pain 2007; 132: 179-88.
  4. Kemler MA, de Vet HC, Barendse GA et al. Effect of spinal cord stimulation for chronic complex regional pain syndrome type I: five-year final follow-up of patients in a randomized controlled trial. J Neurosurg 2008; 108(2):292-8.
  5. Ubbink DT, Vermeulen H. Spinal cord stimulation for non-reconstructable chronic critical leg ischaemia. Cochrane Database Syst Rev 2005; 3:CD004001.
  6. Klomp HM, Spincemaille GH, Steyerberg EW et al. Spinal cord stimulation in critical limb ischemia: a randomized trial. Lancet 1999; 353(9158):1040-4.
  7. Klomp HM, Steyerberg EW, van Urk H et al. ESES Study Group. Spinal cord stimulation is not cost-effective for non-surgical management of critical limb ischaemia. Eur J Vasc Endovasc Surg. 2006; 31(5):500-8.
  8. Klomp HM, Steyerberg EW, Habbema JD et al. What is the evidence on efficacy of spinal cord stimulation in (subgroups of) patients with critical limb ischemia? Ann Vasc Surg 2009; 23(3):355-63.
  9. Taylor RS, De Vries J, Buchser E et al. Spinal cord stimulation in the treatment of refractory angina: systematic review and meta-analysis of randomised controlled trials. BMC Cardiovasc Disord 2009; 9:13.
  10. Börjesson M, Andrell P, Lundberg D et al. Spinal cord stimulation in severe angina pectoris – A systematic review based on the Swedish Council on Technology Assessment in Health Care report on long-standing pain. Pain 2008; 140(3):501-8.
  11. Mannheimers C, Eliasson T, Augustinsson LE et al. Electrical stimulation versus coronary artery bypass surgery in severe angina pectoris: the ESBY study. Circulation 1998; 97(12):1157-63.
  12. Ekre O, Eliasson T, Norrsell H et al. Long-term effects of spinal cord stimulation and coronary artery bypass grafting on quality of life and survival in the ESBY study. Eur Heart J 2002; 23(24):1938-45.
  13. McNab D, Khan SN, Sarples LD et al. An open label, single-centre, randomized trial of spinal cord stimulation vs. percutaneous myocardial laser revascularization in patients with refractory angina pectoris: the SPiRiT trial. Eur Heart J 2006; 27(9):1048-53.
  14. Zipes DP, Svorkdal N, Berman D et al. Spinal cord stimulation therapy for patients with refractory angina who are not candidates for revascularization. Neuromodulation 2012; 15(6):550-9.
  15. Bondesson S, Pettersson T, Erdling A et al. Comparison of patients undergoing enhanced external counterpulsation and spinal cord stimulation for refractory angina pectoris. Coron Artery Dis 2008; 19(8):627-34.
  16. Lanza GA, Grimaldi R, Greco S et al. Spinal cord stimulation for the treatment of refractory angina pectoris: a multicenter randomized single-blind study (the SCS-ITA trial). Pain 2011; 152(1):45-52.
  17. Mekhail NA, Mathews M, Nageeb F et al. Retrospective review of 707 cases of spinal cord stimulation: indications and complications. Pain Pract 2011; 11(2):148-53.
  18. Lanza GA, Barone L, Di Monaco A. Effect of spinal cord stimulation in patients with refractory angina: evidence from observational studies. Neuromodulation 2012; 15(6):542-9.
  19. Spinal Cord Stimulation with Precision SCS System Versus Reoperation for Failed Back Surgery Syndrome (EVIDENCE trial) (NCT01036529). Sponsored by Boston Scientific Corporation. Last updated November 17, 2011. Last accessed January 21, 2013.
  20. Effect of Spinal Cord Stimulation in Painful Diabetic Polyneuropathy (PDP) (NCT01162993). Sponsored by Maastricht University. Last updated April 28, 2011. Last accessed January 21, 2013.
  21. Sponsored by St. Jude Medical. Spinal Cord Stimulation For Heart Failure (NCT01362725). Available online at: www.clinicaltrais.gov.
  22. Mallis A, Taenzer P. Evidence-based guideline for neuropathic pain interventional treatments: spinal cord stimulation, intravenous infusions, epidural injections and nerve blocks. Pain Res Manag 2012; 17(3): 150-8.
  23. American Society of Interventional Pain Physicians. Comprehensive evidence-based guidelines for interventional techniques in the management of chronic spinal pain. (Revised July-August 2009) NGC:007428. Available online at: http://www.guideline.gov. Last accessed January 21, 2013.
  24. National Institute for Health and Clinical Excellence (NICE). Spinal cord stimulation for chronic pain of neuropathic or ischaemic origin. NICE Technology Appraisal Guidance 159. October 2008. Available online at: http://guidance.nice.org.uk/TA159. Last accessed January 21, 2013.
  25. Boswell MV, Trescot AM, Datta S et al; American Society of Interventional Pain Physicians. Interventional techniques: evidence-based practice guidelines in the management of chronic spinal pain. Pain Physician 2007; 10(1):7-111.
  26. Fox K, Garcia MA, Ardissino D et al. Guidelines on the management of stable angina pectoris: executive summary. The Task Force on the Management of Stable Angina Pectoris of the European Society of Cardiology. Eur Heart J 2006; 27(11):1341-81.
  27. Centers for Medicare and Medicaid Services. National Coverage Determination for Electrical Nerve Stimulators (160.7). Available online at: http://www.cms.gov/medicare-coverage-database/. Last accessed January 21, 2013.
  28. BlueCross BlueShield Association Medical Policy Reference Manual “Spinal Cord Stimulation”: Policy No. 7.01.25. Last review January 2012.
  29. Hayes Inc. Hayes Medical Technology Directory Report. Spinal Cord Stimulation for Relief of Neuropathic Pain. Lansdale, PA:Hayes, Inc.;January 2012.
  30. Turner JA, Hollingworth W, Comstock BA, Deyo RA. Spinal cord stimulation for failed back surgery syndrome: outcomes in a workers’ compensation setting. Pain. 2010;148(1):14-25.
  31. Washington State Health Care Authority. Health Technology Clinical Committee. Findings and Coverage Decision:Spinal Cord Stimulation. October 22, 2010.

Coding

Codes

Number

Description

CPT

63650

Percutaneous implantation of neurostimulator electrode array, epidural

 

63655

Laminectomy for implantation of neurostimulator electrodes, plate/paddle, epidural

 

63661

Removal of spinal neurostimulator electrode percutaneous array(s), including fluoroscopy, when performed

 

63662

Removal of spinal neurostimulator electrode plate/paddle(s) placed via laminotomy or laminectomy, including fluoroscopy, when performed

 

63663

Revision including replacement, when performed, of spinal neurostimulator electrode percutaneous array(s), including fluoroscopy, when performed

 

63664

Revision including replacement, when performed, of spinal neurostimulator electrode plate/paddle(s) placed via laminotomy or laminectomy, including fluoroscopy, when performed

 

63685

Insertion or replacement of spinal neurostimulator pulse generator or receiver, direct or inductive coupling

 

63688

Revision or removal of implanted spinal neurostimulator pulse generator or receiver

 

95970

Electronic analysis of implanted neurostimulator pulse generator system (e.g., rate, pulse amplitude and duration, configuration of wave form, battery status, electrode selectability, output modulation, cycling, impedance and patient compliance measurements); simple or complex brain, spinal cord, or peripheral (i.e., cranial nerve, peripheral nerve, autonomic nerve, neuromuscular) neurostimulator pulse generator/transmitter, without reprogramming

 

95971

Simple spinal cord, or peripheral (i.e., peripheral nerve, autonomic nerve, neuromuscular) neurostimulator pulse generator/transmitter, with intraoperative or subsequent programming

 

95972

Complex spinal cord, or peripheral (except cranial nerve) neurostimulator pulse generator/transmitter, with intraoperative or subsequent programming, first hour

 

95973

Complex spinal cord, or peripheral (except cranial nerve) neurostimulator pulse generator/transmitter, with intraoperative or subsequent programming, each additional 30 minutes after first hour (List separately in addition to code for primary procedure) (Use 95793 in conjunction with 95972)

ICD-10-CM
(effective 10/1/14)

G56.40 – G56.42

Causalgia of upper limb code range

 

G57.70 – G57.72

Causalgia of lower limb code range

 

G89.21 – G89.8

Chronic pain, not elsewhere classified, code range

 

G89.4

Chronic pain syndrome

 

G90.50 – G90.59

Complex regional pain syndrome I (CRPS I), code range

 

M25.50 – M25.579

Pain in joint, code range

 

M54.10 – M54.18

Radiculopathy, code range

 

M54.30 – M54.32

Sciatica, code range

 

M54.40 – M54.42

Lumbago with sciatica, code range

 

M54.5

Low back pain

 

M54.6

Pain in thoracic spine

 

M54.81, M54.89

Other dorsalgia codes

 

M54.9

Dorsalgia, unspecified

 

M79.1

Myalgia

 

M79.60 – M79.676

Pain in limb, hand, foot, fingers and toes code range

 

R52

Pain, unspecified

ICD-10-PCS
(effective 10/1/14)

00HU0MZ, 00HU3MZ,
00HU4MZ

Surgical, central nervous system, insertion, spinal canal, neurostimulator lead, code by approach

 

00HV0MZ, 00HV3MZ,
00HV4MZ

Surgical, central nervous system, insertion, spinal cord, neurostimulator lead, code by approach

 

00WU0MZ, 00WU3MZ,
00WU4MZ

Surgical, central nervous system, removal, spinal canal, neurostimulator lead, code by approach

 

00PV0MZ, 00PV3MZ,
00PV4MZ

Surgical, central nervous system, removal, spinal cord, neurostimulator lead, code by approach

 

00WU0MZ, 00WU3MZ,
00WU4MZ

Surgical, central nervous system, revision, spinal canal, neurostimulator lead, code by approach

 

00WV0MZ, 00WV3MZ,
00WV4MZ

Surgical, central nervous system, revision, spinal cord, neurostimulator lead, code by approach

 

0JH60M6, 0JH60M7,
0JH60M8, 0JH60M9,
0JH63M6, 0JH63M7,
0JH63M8, 0JH63M9,
0JH70M6, 0JH70M7,
0JH70M8, 0JH70M9,
0JH73M6, 0JH73M7,
0JH73M8, 0JH73M9,
0JH80M6, 0JH80M7,
0JH80M8, 0JH80M9,
0JH83M6, 0JH83M7,
0JH83M8, 0JH83M9

Surgical, subcutaneous tissue and fascia, insertion, stimulator generator, code by body part, approach, number of arrays and whether rechargeable or not

 

0JPT0MZ, 0JPT3MZ

Surgical, subcutaneous tissue and fascia, removal, subcutaneous tissue and fascia, trunk, stimulator generator, code by approach (there aren’t ICD-10-PCS codes for removal of stimulator generator from other body parts)

ICD-9 Procedure

02.93

Implantation or replacement of intracranial neurostimulator lead(s)

 

03.93

Implantation or replacement of spinal neurostimulator lead(s)

 

03.94

Removal of spinal neurostimulator lead(s)

 

86.05

Incision with removal of foreign body or device from skin and subcutaneous tissue (used to report removal of a neurostimulator pulse generator)

 

86.09

Other incision of skin and subcutaneous tissue

 

86.94

Insertion or replacement of single array neurostimulator pulse generator, not specified as rechargeable

 

86.95

Insertion or replacement of dual array neurostimulator pulse generator, not specified as rechargeable

 

86.97

Insertion or replacement of single array rechargeable neurostimulator pulse generator

 

86.98

Insertion or replacement of dual array rechargeable neurostimulator pulse generator

ICD-9 Diagnosis

   

HCPCS

L8680

Implantable neurostimulator electrode, each

 

L8681

Patient programmer (external) for use with implantable programmable neurostimulator pulse generator

 

L8682

Implantable neurostimulator radiofrequency receiver

 

L8684

Radiofrequency transmitter (external) for use with implantable sacral root neurostimulator receiver for bowel and bladder management, replacement

 

L8685

Implantable neurostimulator pulse generator, single array, rechargeable, includes extension

 

L8686

Implantable neurostimulator pulse generator, single array, non-rechargeable, includes extension

 

L8687

Implantable neurostimulator pulse generator, dual array, rechargeable, includes extension

 

L8688

Implantable neurostimulator pulse generator, dual array, non-rechargeable, includes extension

 

L8689

External recharging system for battery (internal) for use with implantable neurostimulator, replacement only

Type of Service

Surgical

 

Place of Service

Inpatient

Outpatient

 

Appendix

N/A

History

Date

Reason

04/10/12

New policy replacing 7.01.25.

07/20/12

Clarification made to first policy statement; pain is defined in single nerve-root distribution change to lumbosacral nerve root distribution, as approved by MPC on April 10, 2012.

08/27/12

Update Related Policies – Add 7.01.20. Update Coding Section – ICD-10 codes are now effective 10/01/2014.

04/16/13

Replace policy. No change to policy statements. References 14, 18, 21, 22 added.

12/19/13

Update Related Policies. Remove 1.01.19 as it was archived.


Disclaimer: This medical policy is a guide in evaluating the medical necessity of a particular service or treatment. The Company adopts policies after careful review of published peer-reviewed scientific literature, national guidelines and local standards of practice. Since medical technology is constantly changing, the Company reserves the right to review and update policies as appropriate. Member contracts differ in their benefits. Always consult the member benefit booklet or contact a member service representative to determine coverage for a specific medical service or supply. CPT codes, descriptions and materials are copyrighted by the American Medical Association (AMA).
©2014 Premera All Rights Reserved.