Functional Electrical Stimulation and Neuromuscular Electrical Stimulation — CPB 0677 | AETNA Coverage Update

Aetna modified CPB 0677 covering functional electrical stimulation (FES) and neuromuscular electrical stimulation (NMES), effective February 21, 2026. Here's what billing teams need to know before submitting claims under HCPCS E0764, E0770, E0745, and related codes.

Aetna, a CVS Health company, updated this coverage policy to address FES for spinal cord injury ambulation, NMES for disuse atrophy, conductive garment delivery, and a range of implantable neurostimulator systems. CPB 0677 Aetna is one of the more criteria-heavy policies in the neurostimulation space — 10 required criteria for FES alone before you can bill E0764. The update also formally addresses several devices as non-covered, including HCPCS A4560, E0762, and E0734, which matters if any of those codes are still live in your charge capture.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Functional Electrical Stimulation and Neuromuscular Electrical Stimulation
Policy Code	CPB 0677
Change Type	Modified
Effective Date	February 21, 2026
Impact Level	High
Specialties Affected	Physical medicine & rehabilitation, neurology, orthopedic surgery, DME suppliers, spinal cord injury programs, sleep medicine
Key Action	Audit charge capture for non-covered HCPCS codes (A4560, E0762, E0734, E0743) and verify all 10 FES criteria are documented before billing E0764

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Aetna FES and NMES Coverage Criteria and Medical Necessity Requirements 2026

The Aetna FES and NMES coverage policy under CPB 0677 sets out distinct criteria for three separate interventions: FES for ambulation, NMES for disuse atrophy, and conductive garments. Each has its own medical necessity checklist. Miss one criterion, and you're looking at a claim denial.

FES for Spinal Cord Injury Ambulation (HCPCS E0764)

Aetna covers FES as durable medical equipment for SCI members who can ambulate using the Parastep I System — but only when all 10 criteria are met simultaneously. This is an "all of the following" structure, not a pick-three. Every single item must be documented.

The 10 criteria are:

The real issue here is criterion nine. Your clinical team must document 32 completed PT sessions before the claim goes out. If the training is still in progress, FES billing under E0764 is premature. Build that checkpoint into your workflow now — before February 21, 2026.

Aetna also covers replacement of a medically necessary FES unit when the original device is out of warranty and cannot be repaired. Document the original approval and the repair assessment clearly in the file.

NMES for Disuse Atrophy (HCPCS E0745, E0770)

NMES as DME is covered when nerve supply to the muscle is intact and the member has a non-neurological reason for disuse atrophy. Aetna accepts four covered indications:

The hip replacement indication is time-bounded. Once physical therapy begins, medical necessity for NMES ends. Track that transition carefully or you'll have reimbursement clawback risk.

Aetna also flags a dosing ceiling: more than two hours of NMES per day is not medically necessary. This matters for DME suppliers billing supply codes like A4595 and A4558 — if your documentation shows higher utilization, prior authorization won't save you.

Conductive Garments (HCPCS E0731)

Aetna covers form-fitting conductive garments as DME when the garment is FDA-approved, physician-prescribed for medically necessary NMES, and one of the following applies:

#	Covered Indication Copy
1	The member cannot manage without the garment due to the large area or number of stimulation sites, and frequent stimulation makes conventional electrodes impractical
2	The member has a documented medical condition that makes conventional electrodes contraindicated

This is a narrow coverage window. FDA marketing clearance is a hard requirement — document it. The "large area" rationale also needs specific clinical justification in the record, not a generic note.

Implantable Neurostimulator Systems (CPT 63655, 63685, 64555–64595, HCPCS L8680–L8689)

Aetna covers implantable neurostimulator systems for several covered indications when selection criteria are met. This includes laminectomy with electrode implantation (CPT 63655), pulse generator insertion or replacement (CPT 63685), and percutaneous electrode implantation (CPT 64555, 64561, 64565). Associated HCPCS codes for generators and leads — L8680 through L8689 — follow the same selection criteria structure.

Phrenic nerve stimulator systems for central sleep apnea are also covered under this policy. Relevant CPT codes include 33277 through 33288 and activation/programming codes 93150, 93151, and 93152. HCPCS C1823 covers the implantable non-rechargeable neurostimulator generator for this indication.

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Aetna FES and NMES Exclusions and Non-Covered Indications

Several devices and indications are explicitly excluded under this coverage policy. This is where claim denial risk is highest — these are active non-covered designations, not just gaps in coverage.

Explicitly not covered:

NMES is also specifically contraindicated — and therefore not covered — in members with cardiac pacemakers. Document pacemaker status before submitting any NMES claim.

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Coverage Indications at a Glance

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Aetna FES and NMES Billing Guidelines and Action Items 2026

FES and NMES billing under Aetna requires tight documentation discipline. The criteria lists are long and the non-covered list is specific. Here's what to do before the effective date of February 21, 2026.

Copy Action Items

If you're unsure how these criteria apply to your patient mix or billing workflows, loop in your compliance officer before the effective date.

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CPT, HCPCS, and ICD-10 Codes for FES and NMES Under CPB 0677

Covered CPT Codes (When Selection Criteria Are Met)

Other CPT Codes Related to CPB 0677

Covered HCPCS Codes (When Selection Criteria Are Met)

Not Covered HCPCS Codes Under CPB 0677

Other HCPCS Codes Related to CPB 0677

Code	Type	Description Copy
J1120	HCPCS	Injection, acetazolamide sodium, up to 500 mg
J2810	HCPCS	Injection, theophylline, per 40 mg

Key ICD-10-CM Diagnosis Codes

Note: CPB 0677 lists 461 ICD-10-CM codes. The full list — including codes across malignant neoplasms (C00.0–C95.92), neurological conditions, and musculoskeletal diagnoses — is available in the full policy at app.payerpolicy.org/p/aetna/0677.

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