Bone Growth Stimulators — CPB 0343 | AETNA Coverage Update

Aetna modified CPB 0343 covering bone growth stimulators, effective March 1, 2026. Here's what changes for billing teams.

Aetna, a CVS Health company, updated its bone growth stimulator coverage policy under CPB 0343 in the Aetna system, affecting CPT codes 20974, 20975, 20979, and 97035, along with HCPCS codes E0747, E0748, E0749, and E0760. This policy governs both ultrasonic osteogenesis stimulators and electrical bone-growth stimulators billed as durable medical equipment. If your practice treats fractures, spinal fusions, or non-unions and bills Aetna, this update directly affects your reimbursement.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna
Policy	Bone Growth Stimulators
Policy Code	CPB 0343
Change Type	Modified
Effective Date	March 1, 2026
Impact Level	High
Specialties Affected	Orthopedic surgery, podiatry, neurosurgery, spine surgery, physical medicine & rehabilitation
Key Action	Audit charge capture for CPT 20974, 20975, 20979, and HCPCS E0747–E0760 against updated medical necessity criteria before submitting claims dated on or after March 1, 2026

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Aetna Bone Growth Stimulator Coverage Criteria and Medical Necessity Requirements 2026

The Aetna bone growth stimulator coverage policy draws a clear line between two device categories: ultrasonic osteogenesis stimulators and electrical stimulators. Each has its own medical necessity criteria. Bill the wrong indication, and you'll face a claim denial.

Ultrasonic Osteogenesis Stimulators (CPT 20979, HCPCS E0760)

Aetna covers ultrasonic osteogenesis stimulators — devices that use pulsed ultrasound to accelerate healing — for fresh fractures, fusions, or delayed unions at four specific high-risk sites. These sites are high-risk because of poor vascular supply, which is exactly why pulsed ultrasound therapy has clinical support here.

The four covered sites are:

Ultrasonic stimulators also cover non-unions, failed arthrodesis, and congenital pseudarthrosis of the appendicular skeleton — but only when all of the following conditions are met: no X-ray evidence of healing progression for three or more months despite appropriate care, the bone is non-infected, the bone is stable on both ends via cast or fixation, and the two bone portions are separated by less than 1 cm.

That last detail — the less-than-1-cm gap requirement — is the one most commonly missed in prior authorization documentation. If the gap is 1 cm or greater, Aetna will not cover the device.

Electrical Stimulators — Non-Spinal (CPT 20974, 20975; HCPCS E0747, E0749)

For non-spinal indications, electrical stimulators (direct current, inductive coupling, or capacitive coupling) are covered for two scenarios. First, delayed unions or failed arthrodesis at high-risk sites. Aetna specifically calls out open or segmental tibial fractures, carpal navicular fractures, 5th metatarsal fractures, distal radius fractures, and sesamoid bones — including the fibular sesamoid in the foot. Second, non-unions, failed fusions, and congenital pseudarthrosis with no X-ray healing progression for three or more months.

The same criteria apply: non-infected bone, stable on both ends, gap less than 1 cm.

Electrical Stimulators — Spinal (HCPCS E0748)

Spinal applications have their own coverage path. Aetna covers spinal electrical stimulators (billed under E0748) for any of three indications:

#	Covered Indication Copy
1	Multi-level fusion of three or more vertebrae (e.g., L3–L5 or L4–S1)
2	Grade II or worse spondylolisthesis
3	One or more failed fusions

This is one of the cleaner parts of the policy — the criteria are specific and verifiable. If your spine surgery team bills E0748, pull the operative reports and confirm the fusion level count before claim submission.

The source policy does not specify prior authorization requirements for bone growth stimulators. Confirm PA requirements directly with Aetna before submission, particularly for surgical implantation cases billed under CPT 20975 and E0749.

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Aetna Bone Growth Stimulator Exclusions and Non-Covered Indications

Aetna classifies several indications as experimental, investigational, or unproven. Billing these will result in a claim denial under CPB 0343.

Ultrasonic osteogenesis stimulators are not covered for:

#	Excluded Procedure Copy
1	Fractures of the axial skeleton (skull and vertebrae), including lumbar compression fractures, stress fractures, and avulsion fractures of the hip
2	Avascular necrosis of the femoral head
3	All other indications not explicitly listed as covered — the medical literature does not support use outside the covered sites

The axial skeleton exclusion matters for spine practices. Ultrasonic stimulators are not a covered alternative to electrical spinal stimulators. These are different devices with different coverage rules. Don't substitute E0760 for E0748 in a spinal fusion case.

The avascular necrosis exclusion catches practices managing femoral head complications after fracture. This is a common clinical scenario, and the denial rate here is predictable if your team isn't flagging it up front.

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Coverage Indications at a Glance

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Aetna Bone Growth Stimulator Billing Guidelines and Action Items 2026

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Bone Growth Stimulators Under CPB 0343

Covered CPT Codes (When Selection Criteria Are Met)

Covered HCPCS Codes (When Selection Criteria Are Met)

Key ICD-10-CM Diagnosis Codes

The full ICD-10 code set under CPB 0343 includes 141 codes. The codes above represent the major groupings most relevant to bone growth stimulator billing. Review the complete list at the Aetna CPB 0343 source policy before finalizing your charge capture updates.

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