Nerve Conduction Velocity Studies — CPB 0502 | AETNA Coverage Update

TL;DR: Aetna, a CVS Health company, modified CPB 0502 governing nerve conduction velocity (NCV) study coverage, effective December 20, 2025. Billing teams using CPT codes 95907–95913, 95905, 95933, and 95937 need to review medical necessity criteria and EMG pairing requirements before submitting claims.

Aetna's nerve conduction velocity coverage policy update tightens how the payer evaluates medical necessity for NCV studies across a wide range of neuromuscular conditions. The policy covers CPT codes 95907 through 95913 — the tiered nerve conduction study codes — along with 95905, 95933, and 95937 for specific testing configurations. If your practice bills electrodiagnostic studies for Aetna members, this change deserves a close read before December 20, 2025.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Nerve Conduction Velocity Studies — CPB 0502
Policy Code	CPB 0502
Change Type	Modified
Effective Date	December 20, 2025
Impact Level	High
Specialties Affected	Neurology, Physical Medicine & Rehabilitation, Orthopedic Surgery, Pain Management, Electrodiagnostic Medicine
Key Action	Audit NCV claims for concurrent or prior-year EMG documentation and disease-specific selection criteria before submitting on or after December 20, 2025

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Aetna Nerve Conduction Velocity Coverage Criteria and Medical Necessity Requirements 2025

The real issue with CPB 0502 is the layered structure of its medical necessity criteria. You don't just need a qualifying diagnosis. You need the right diagnosis, paired with an EMG study, and — for several conditions — disease-specific selection criteria on top of that.

The Three-Layer Test

Aetna requires all three of these layers to approve NCV studies:

Layer 1: A qualifying clinical indication. The member must have at least one of the following:

Layer 2: A concurrent or prior-year needle EMG. The member must have had a needle electromyographic study either at the same time as the NCV or within the past 12 months. This is not optional — it's a hard requirement that will drive claim denial if it's missing from documentation.

The EMG requirement can be waived in two situations. First, for members on anticoagulant therapy — warfarin, dabigatran (Pradaxa), desirudin (Iprivask), or heparins that cannot be interrupted. Second, when the sole purpose of the NCV study is to diagnose or rule out carpal tunnel syndrome, Charcot-Marie-Tooth disease, myasthenia gravis, or Lambert-Eaton myasthenic syndrome.

Layer 3: Disease-specific selection criteria. For several conditions, Aetna requires more than just the diagnosis. These aren't suggestions — they're gatekeeping criteria that affect reimbursement.

Carpal Tunnel Syndrome

For carpal tunnel evaluation, Aetna requires all of the following:

#	Covered Indication Copy
1	Sensory conduction studies across the wrist of the median nerve; if abnormal, one additional sensory nerve in the symptomatic limb
2	If the initial median sensory study uses a conduction distance greater than 8 cm and results are normal, the provider must add either: a comparison of median sensory conduction across the wrist with radial or ulnar sensory conduction in the same limb, or median sensory conduction across the wrist at a short (7–8 cm) distance
3	Motor conduction studies of the median nerve recording from the thenar muscle, plus one other nerve in the symptomatic limb, including distal latency measurement

This is a specific protocol. Deviations from it will produce denials.

Radiculopathy (Cervical, Thoracic, or Lumbar)

For radiculopathy evaluations, all three of these must be true:

#	Covered Indication Copy
1	Symptoms are persistent or progressive
2	Conservative treatment has failed — medications, physical therapy, or similar — for at least four weeks
3	Imaging studies (MRI, myelogram) do not explain the symptoms

Aetna's medical necessity criteria for radiculopathy are strict — all three conditions must be met or the NCV study will not be considered medically necessary. If imaging already explains the presentation, Aetna won't approve the NCV study. Document the gap between clinical findings and imaging results explicitly.

Diabetic Peripheral Neuropathy

The policy summary was truncated at the diabetic peripheral neuropathy section. If your patient mix includes significant diabetic neuropathy volume, pull the full CPB 0502 text directly from Aetna before December 20, 2025. Don't assume criteria carried over from the previous version unchanged.

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Aetna NCV Study Exclusions and Non-Covered Indications

CPT 95905 — the preconfigured electrode array code — appears in this policy alongside CPT 95940 and 95941 for intraoperative neurophysiology monitoring. These three codes are flagged under the Cadwell Sierra II system group with a note of "no specific code," which signals limited or excluded coverage in that context.

Intraoperative NCV studies during prostate surgery are explicitly not covered. The policy lists a large block of prostate surgery CPT codes and flags them as excluded contexts for NCV monitoring.

The same applies to wrist arthroscopy codes (29840–29847). These appear in the policy as related codes, not covered codes. NCV studies billed alongside arthroscopic wrist procedures will not meet Aetna's coverage policy criteria.

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Coverage Indications at a Glance

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Aetna Nerve Conduction Velocity Billing Guidelines and Action Items 2025

Here's what your billing team needs to do before December 20, 2025.

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Nerve Conduction Studies Under CPB 0502

Covered CPT Codes (When Selection Criteria Are Met)

Not Covered / Excluded Codes

Prostate Surgery CPT Codes (Intraoperative NCV Not Covered)

Aetna explicitly excludes intraoperative NCV studies for prostate surgery codes beginning at 52400. If your practice does intraoperative monitoring, confirm these are not paired with NCV charges.

Code Range	Context Copy
52400+ — confirm full range in CPB 0502	Prostate surgery — intraoperative NCV studies not covered

The policy lists individual codes in this range. Confirm the full list in CPB 0502 for your charge capture review.

HCPCS Codes

The source policy references one HCPCS code. The code detail was not available in the policy extract reviewed. Confirm HCPCS applicability by pulling the full CPB 0502 text directly from Aetna.

Key ICD-10-CM Diagnosis Codes

The policy references 481 ICD-10-CM codes. The source data did not include the full code list in the provided extract. Pull the complete ICD-10 list directly from CPB 0502 on Aetna's policy portal. Conditions documented in the medical necessity criteria above — including amyotrophic lateral sclerosis, Guillain-Barré syndrome, carpal tunnel syndrome, myasthenia gravis, diabetic neuropathy, radiculopathy, and peripheral neuropathy — will have corresponding ICD-10 codes in that list. Verify your diagnosis codes map to covered indications before billing.

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