TL;DR: Aetna, a CVS Health company, modified CPB 0112 covering surface electromyography, effective September 26, 2025. CPT 96002 and 96004 are directly in scope — here's what your billing team needs to do before claims start hitting.
Aetna updated its surface scanning and macro electromyography coverage policy under CPB 0112 in the Aetna system, effective September 26, 2025. The policy governs CPT 96002 (dynamic surface EMG during walking or functional activities, one to 12 muscles) and CPT 96004 (physician review and interpretation), along with HCPCS S3900 (surface EMG). If your practice bills surface EMG for spine, nerve root, or musculoskeletal conditions — and your payer mix includes Aetna — this update affects your reimbursement and claim denial risk starting now.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | Surface Scanning and Macro Electromyography |
| Policy Code | CPB 0112 |
| Change Type | Modified |
| Effective Date | September 26, 2025 |
| Impact Level | High |
| Specialties Affected | Neurology, Physical Medicine & Rehabilitation, Pain Management, Spine Surgery, Orthopedic Surgery |
| Key Action | Audit all open and pending claims for CPT 96002, 96004, and HCPCS S3900 against updated CPB 0112 criteria before submitting to Aetna |
Aetna Surface EMG Coverage Criteria and Medical Necessity Requirements 2025
The Aetna surface electromyography coverage policy under CPB 0112 draws a hard line between covered and non-covered uses. This matters because surface EMG is often billed as part of broader neurophysiologic or gait analysis workups — and Aetna's groupings show they're watching closely.
CPT 96002 covers dynamic surface electromyography performed during walking or other functional activities, measuring one to 12 muscles. CPT 96004 covers physician or qualified healthcare professional review and interpretation of those results. These codes fall within the Neurophysiologic Pain Profile (NPP) and Spine Matrix Scan groupings — both flagged as not covered under this policy. That's the critical detail your billing team cannot miss.
HCPCS S3900 for surface EMG is explicitly listed under "HCPCS codes not covered for indications listed in the CPB." There is no ambiguity here. Aetna does not consider surface EMG — billed under any of these three codes — medically necessary for the listed indications.
Medical necessity is the central issue. If your providers are ordering surface EMG and billing Aetna with diagnoses in the G54 nerve root and plexus range, the G57 mononeuropathy range, or F45.8 (somatoform disorders), the policy does not support coverage. Prior authorization will not save you if the underlying indication is excluded — Aetna's coverage policy bars the service at the indication level, not just the authorization level.
If you are unsure how this applies to your specific patient population or contract terms, talk to your compliance officer before submitting claims against these codes.
Aetna Surface EMG Exclusions and Non-Covered Indications
This is where CPB 0112 does the most damage to billing teams who aren't paying attention.
All three codes in this policy — CPT 96002, CPT 96004, and HCPCS S3900 — are grouped as non-covered under this policy. The CPT codes carry the group label "Neurophysiologic Pain Profile (NPP), Spine Matrix Scan — no." That language means Aetna treats surface EMG as experimental or not medically necessary when billed in the context of NPP or Spine Matrix Scan services.
S3900 gets an even blunter treatment: it's listed under "HCPCS codes not covered for indications listed in the CPB." The 233 ICD-10-CM codes in this policy represent the diagnostic range where Aetna applies these exclusions — spanning nerve root disorders (G54.0–G54.9), lower limb mononeuropathies (G57.x), and somatoform disorders (F45.8). None of these pairings result in a covered claim under CPB 0112.
This is not a new pattern. Aetna has taken similar positions on unproven neurophysiologic testing in other policies. The real issue here is that surface EMG sounds clinically reasonable — muscle activity during gait, during functional movement — but Aetna's position is that the evidence doesn't support it as medically necessary for diagnosis or treatment planning.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Neurophysiologic Pain Profile (NPP) | Not Covered | CPT 96002, 96004 | Explicitly grouped as non-covered in CPB 0112 |
| Spine Matrix Scan | Not Covered | CPT 96002, 96004 | Same non-covered grouping as NPP |
| Surface EMG (general) | Not Covered | HCPCS S3900 | Listed under "HCPCS codes not covered for indications in the CPB" |
| Nerve root and plexus disorders | Not Covered | G54.0–G54.9 | Diagnosis codes present but indication is non-covered |
| Lower limb mononeuropathies | Not Covered | G57.0–G57.9x | Extensive code range — all non-covered |
| Somatoform disorders | Not Covered | F45.8 | Non-covered pairing with surface EMG |
Aetna Surface EMG Billing Guidelines and Action Items 2025
The effective date of September 26, 2025 has already passed. If your team has submitted CPT 96002, 96004, or HCPCS S3900 claims to Aetna on or after that date, you need to act now.
| # | Action Item |
|---|---|
| 1 | Pull all Aetna claims for CPT 96002, 96004, and S3900 submitted on or after September 26, 2025. Review each claim's diagnosis codes against the CPB 0112 ICD-10 list. If the claim carried a G54.x, G57.x, or F45.8 diagnosis, expect denial. |
| 2 | Stop billing S3900 to Aetna for any indication covered in CPB 0112. HCPCS S3900 has no covered pathway under this policy. If your charge capture still includes S3900 as a standard add-on for neurophysiologic testing, remove it from Aetna-specific charge sheets immediately. |
| 3 | Update your billing guidelines and charge capture templates. Flag CPT 96002 and 96004 as requiring coverage review before submission on any Aetna patient. These codes are not categorically non-billable — but they're non-covered for NPP and Spine Matrix Scan contexts. Your team needs a clear workflow to distinguish covered from non-covered use cases. |
| 4 | Do not rely on prior authorization as a coverage workaround. Prior auth does not override a CPB-level exclusion. If Aetna has excluded the indication in the policy, an authorization doesn't guarantee payment — and chasing one wastes your team's time. Focus on clinical documentation that supports a covered indication, or discuss with your compliance officer whether any covered pathway exists for your patient population. |
| 5 | Review denied claims from the past 90 days for surface EMG billing. If you've seen upticks in Aetna denials on neurophysiologic or gait analysis claims, CPB 0112's surface EMG exclusions may be the root cause. Use your remittance data to isolate denial reason codes tied to these CPTs. |
| 6 | Educate your ordering physicians on Aetna's surface EMG position. If your neurologists, PM&R physicians, or spine surgeons are routinely ordering surface EMG studies for Aetna patients, they need to know the reimbursement picture. A covered alternative — needle EMG, nerve conduction studies — may be appropriate depending on the clinical question. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Surface EMG Under CPB 0112
Not Covered CPT Codes
| Code | Type | Description | Coverage Group |
|---|---|---|---|
| 96002 | CPT | Dynamic surface electromyography, during walking or other functional activities, 1-12 muscles | Neurophysiologic Pain Profile (NPP), Spine Matrix Scan — Not Covered |
| 96004 | CPT | Review and interpretation by physician or other qualified health care professional of comprehensive results | Neurophysiologic Pain Profile (NPP), Spine Matrix Scan — Not Covered |
Not Covered HCPCS Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| S3900 | HCPCS | Surface electromyography (EMG) | HCPCS codes not covered for indications listed in CPB 0112 |
Key ICD-10-CM Diagnosis Codes
These are the diagnoses Aetna maps to CPB 0112. Claims pairing these diagnoses with CPT 96002, 96004, or S3900 will be denied.
| Code | Description |
|---|---|
| F45.8 | Other somatoform disorders |
| G54.0 | Brachial plexus disorders |
| G54.1 | Lumbosacral plexus disorders |
| G54.2 | Cervical root disorders, not elsewhere classified |
| G54.3 | Thoracic root disorders, not elsewhere classified |
| G54.4 | Lumbosacral root disorders, not elsewhere classified |
| G54.5 | Neuralgic amyotrophy |
| G54.6 | Phantom limb syndrome with pain |
| G54.7 | Phantom limb syndrome without pain |
| G54.8 | Other nerve root and plexus disorders |
| G54.9 | Nerve root and plexus disorder, unspecified |
| G57.0 | Lesion of sciatic nerve |
| G57.1 | Meralgia paresthetica (multiple laterality variants: G57.10–G57.19) |
| G57.2 | Lesion of femoral nerve (G57.20–G57.29) |
| G57.3 | Lesion of lateral popliteal nerve (G57.30–G57.39) |
| G57.4 | Lesion of medial popliteal nerve (G57.40–G57.49) |
| G57.5 | Tarsal tunnel syndrome (G57.50–G57.59) |
| G57.6 | Lesion of plantar nerve (G57.60–G57.69) |
Note: CPB 0112 includes 233 total ICD-10-CM codes spanning the full G57.x mononeuropathy range plus additional codes. The full code list is available in the Aetna policy document at CPB 0112.
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