Spinal Cord, Peripheral Nerve, and Percutaneous Electrical Nerve Stimulation
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Clinical policy governing medical necessity and coverage guidance for spinal cord stimulation (SCS), peripheral nerve stimulation (PNS), and percutaneous electrical nerve stimulation (PENS) for Arizona Complete Health members/enrollees.
Added CPT code 0720T as not covered (PENFS cranial nerve stimulation without implantation).
Percutaneous electrical nerve stimulation (PENS) was added to Criteria I as having insufficient evidence to support efficacy and removed from medically necessary criteria.
Strengthened criteria for psychological evaluation and drug abuse screening in multiple sections.
Added new CPT codes 64596, 64597, 64598 and HCPCS L8678 to code lists.
Coverage Criteria Summary
Summary coverage stance
Policy-level coverage stance and key criteria updates present in this excerpt:
Added to Criteria I per May/Nov 2024-11/25 revisions; PENS removed from medically necessary criteria
Added to 'CPT Codes That Do Not Support Coverage Criteria' per May 2024 revision
Specific medical necessity requirements (e.g., trial stimulation, diagnosis of neuropathic pain, conservative therapy, psychological evaluation, substance abuse screening) are referenced elsewhere in the policy and were strengthened in recent revisions
The policy explicitly identifies Percutaneous electrical nerve field stimulation (PENFS) as not supported by coverage criteria. CPT code 0720T ("Percutaneous electrical nerve field stimulation, cranial nerves, without implantation") is listed in the policy section "CPT Codes That Do Not Support Coverage Criteria." Requests for services billed to CPT 0720T are therefore not supported by the coverage criteria in this policy.
The revision history documents that PENS/PENFS were reviewed and designated as having insufficient evidence to support efficacy. As a result, PENS/PENFS were added to the policy’s insufficient-evidence criteria and removed from the medically necessary criteria set during the annual revisions described in the policy log (May and November revisions).
Coding (CPT / HCPCS) Lists
| 0720T | Percutaneous electrical nerve field stimulation, cranial nerves, without implantation |
| 63650 | Percutaneous implantation of neurostimulator electrode array, epidural |
| 63655 | Laminectomy for implantation of neurostimulator electrodes, plate/paddle, epidural |
| 63685 | Insertion or replacement of spinal neurostimulator pulse generator or receiver, requiring pocket creation and connection between electrode array and pulse generator or receiver |
| 64555 | Percutaneous implantation of neurostimulator electrode array; peripheral nerve (excludes sacral nerve) |
| 64575 | Open implantation of neurostimulator electrode array; peripheral nerve (excludes sacral nerve) |
| 64585 | Revision or removal of peripheral neurostimulator electrode array |
| 64590 | Insertion or replacement of peripheral, sacral, or gastric neurostimulator pulse generator or receiver, requiring pocket creation and connection between electrode array and pulse generator or receiver |
| 64595 | Revision or removal of peripheral, sacral, or gastric neurostimulator pulse generator or receiver, with detachable connection to electrode array |
| 64596 | Insertion or replacement of percutaneous electrode array, peripheral nerve, with integrated neurostimulator, including imaging guidance, when performed; initial electrode array |
| 64597 | Insertion or replacement of percutaneous electrode array, peripheral nerve, with integrated neurostimulator, including imaging guidance, when performed; each additional electrode array (List separately in addition to code for primary procedure) |
| L8678 | Electrical stimulator supplies (external) for use with implantable neurostimulator, per month |
| L8679 | Implantable neurostimulator, pulse generator, any type |
| L8680 | Implantable neurostimulator electrode, each |
| L8681 | Patient programmer (external) for use with implantable programmable neurostimulator pulse generator, replacement only |
| L8682 | Implantable neurostimulator radiofrequency receiver |
| L8683 | Radiofrequency transmitter (external) for use with implantable neurostimulator radiofrequency receiver |
| L8685 | Implantable neurostimulator pulse generator, single array, rechargeable includes extension |
| L8686 | Implantable neurostimulator pulse generator, single array, nonrechargeable, includes extension |
| L8687 | Implantable neurostimulator pulse generator, dual array, rechargeable, includes extension |
| L8688 | Implantable neurostimulator pulse generator, dual array, nonrechargeable, includes extension |
Provider Actions & Authorization
Prior Authorization Required
Prior Authorization Required: Requests for implantation of neurostimulator devices, leads, and implanted pulse generators (including CPT and HCPCS codes listed in this policy) typically require prior authorization consistent with Health Plan rules. Providers should obtain authorization before scheduling implant or device-related procedures to avoid claim denials or delays.
- Affected codes include (but are not limited to): CPT 63650, 63655, 63685, 64555, 64575, 64585, 64590, 64595, 64596-64598, 64999 and HCPCS L8678-L8688.
- Prior authorization is also recommended for device programming and electronic analysis services (e.g., CPT 95970) when performed in conjunction with implanted neurostimulator systems.
General Documentation Expectations
Documentation Expectations: Providers must submit clinical documentation that supports medical necessity for the requested service. Documentation should reference relevant CPT descriptions and include detailed clinical information such as diagnosis, prior treatments, symptom duration and severity, response to conservative therapy, rationale for device selection, and any contraindications to alternative treatments. Include operative reports, device and model details (brand/model when applicable), imaging, specialist consultations, psychological evaluation when required by criteria, and objective measures of function or pain when available. Coverage determinations remain subject to the Health Plan's benefit terms, limitations, and coding edits.
- Supply copies of trial stimulation records, stimulation parameters, and outcomes if applicable.
- If requesting revision, replacement, or removal, include prior device implantation details and reason for revision/removal (e.g., infection, device failure, loss of efficacy).
Conservative Therapy Requirement
Conservative Therapy Requirement: Prior conservative therapy must be documented before implanting permanent neurostimulation devices unless the patient meets specific exception criteria (e.g., not a candidate for surgery, acute indications where implant is indicated per policy). Examples of conservative therapies include physical therapy, targeted exercise programs, medication management (including trials of appropriate analgesics or neuropathic agents), interventional procedures (e.g., epidural injections, nerve blocks), and structured multidisciplinary pain management programs. Document the type, duration, frequency, and clinical response to each conservative therapy attempted.
- Include dates and objective evidence of inadequate response to conservative measures.
- When trial stimulation was performed, document trial duration and response to support progression to permanent implantation.
CPT Codes That Do Not Support Coverage Criteria
Not Supported CPT Code(s): Requests involving CPT 0720T (percutaneous electrical nerve field stimulation, cranial nerves, without implantation) are not supported by the coverage criteria and should not be submitted as covered services under this policy.
- CPT 0720T is listed as not supporting the coverage criteria.
Background and Scope
Spinal cord stimulation (SCS), peripheral nerve stimulation (PNS), and related implantable neurostimulator therapies are implantable or percutaneous interventions intended to treat chronic neuropathic and other refractory pain conditions. The policy background was updated to align with revised criteria and supports distinctions between implantable neurostimulators (implantation, pulse generator insertion/replacement, and programming) and non‑implant modalities such as percutaneous electrical nerve field stimulation. The document notes coding and description updates for implant and programming procedures and that policy development and review included internal and external clinical specialists.
Definitions
Conservative Treatment Requirements
Frequency and Limits for Procedures
Imaging Requirements
Document imaging guidance for percutaneous electrode array insertion
Imaging guidance is included in the CPT descriptions for insertion of a percutaneous electrode array with integrated neurostimulator (e.g., CPT 64596–64597); ensure imaging documentation is provided when these procedures are billed.
Not Covered Services
Percutaneous electrical nerve field stimulation (PENFS) for any indication is designated in this policy as having insufficient evidence to support efficacy and does not meet the coverage criteria. CPT 0720T ("Percutaneous electrical nerve field stimulation, cranial nerves, without implantation") is specifically listed as not covered in the policy's coding section and revision log.
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