TL;DR: Aetna, a CVS Health company, modified CPB 0505 covering ambulatory assist devices — walkers, canes, and crutches — effective January 5, 2026. Here's what billing teams need to know before submitting claims.
This update to the Aetna ambulatory assist devices coverage policy affects a wide range of HCPCS codes, including E0100, E0105, E0110–E0116, E0130–E0150, E0638–E0642, and E8000–E8002, among others. CPB 0505 is the Aetna system's governing bulletin for all durable medical equipment (DME) in this category. If your practice, DME supplier, or home health organization bills these codes for Aetna members, this policy sets the floor for every coverage decision.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | Ambulatory Assist Devices: Walkers, Canes, and Crutches |
| Policy Code | CPB 0505 |
| Change Type | Modified |
| Effective Date | January 5, 2026 |
| Impact Level | Medium |
| Specialties Affected | DME suppliers, orthopedics, neurology, physical medicine & rehabilitation, pediatrics, home health |
| Key Action | Audit charge capture for E0117, E0144, E0152, and E0156 — these codes are non-covered under this policy and need claim review before submission |
Aetna Ambulatory Assist Devices Coverage Criteria and Medical Necessity Requirements 2026
The Aetna ambulatory assist devices coverage policy hinges on a three-part medical necessity test. Every device category — canes, crutches, and walkers — requires the same foundational showing before Aetna will cover it.
The member must have a mobility limitation that significantly impairs their ability to perform one or more mobility-related activities of daily living (MRADLs) in the home. Aetna defines MRADLs as toileting, feeding, dressing, grooming, and bathing — performed in customary home locations. That "in the home" qualifier matters. Functional need outside the home does not drive this coverage decision.
The mobility limitation itself must meet at least one of three conditions. It either prevents the member from completing the MRADL entirely, places them at a heightened risk of morbidity or mortality when attempting it, or prevents them from completing it within a reasonable time frame.
That's not enough on its own. Two additional criteria must also be satisfied. The member must be able to safely use the device, and the device must sufficiently resolve the functional mobility deficit. All three prongs — MRADL impairment, safe use, and functional resolution — are required. Miss one and the claim is exposed to denial.
Canes and Crutches: CPB 0505 Aetna Criteria
For standard canes (E0100, E0105) and forearm or underarm crutches (E0110, E0111, E0112, E0113, E0114, E0116), the three-part test applies in full. The policy also covers E0118, the lower-leg platform crutch substitute (billed for the iWalkFree device), under the same criteria.
Accessories — underarm pads (A4635), replacement handgrips (A4636), and replacement tips (A4637) — are covered when the underlying device meets criteria. Don't submit accessory codes as standalone claims without documentation supporting the primary device's medical necessity.
Standard Walkers
Walker coverage under this policy covers rigid pick-up (E0130), folding pick-up (E0135), trunk-support (E0140), rigid wheeled (E0141), folding wheeled (E0143), and heavy-duty variants (E0147, E0148, E0149). The combination wheeled walker with seat and transport chair (E0150) is also covered when criteria are met.
A standard walker may include wheels and glide-type brakes. Aetna defines a glide-type brake as a spring mechanism that raises the walker's leg post off the ground when the member isn't applying downward pressure. This isn't a fringe distinction — it matters when determining whether a wheeled walker accessory like a brake replacement (E0159) or wheel attachment (E0155) is appropriate to bill alongside the base walker code.
Walker accessories — platform attachments (E0153, E0154), wheel attachments (E0155), crutch attachments (E0157), and leg extensions (E0158) — are covered when selection criteria are met. The seat attachment (E0156) is not covered. More on that below.
Pediatric Devices
Aetna covers pediatric crawlers and the Mulholland Walkabout as DME for disabled children with impaired ambulation and insufficient trunk stability. Pediatric gait trainers — E8000 (posterior support), E8001 (upright support), and E8002 (anterior support) — are covered when criteria are met.
Specially adapted strollers are covered as DME when used in place of a wheelchair for children. Standard strollers are not covered. Aetna's position is that standard strollers don't meet the contractual DME definition because they're normally used without illness or injury present. That's a line that matters if your pediatric practice is billing for mobility equipment.
Standing frame systems — E0638, E0641, and E0642 — are also covered under this policy for appropriate pediatric and adult indications.
Prior Authorization and Reimbursement Considerations
CPB 0505 does not specify a universal prior authorization requirement for all devices in this category. However, prior auth requirements vary by plan and market. Before billing high-cost walker configurations or pediatric gait trainers, confirm prior authorization requirements with the specific Aetna plan. The reimbursement exposure on E8000–E8002 and standing frames is significant enough to warrant that check before you submit.
Aetna Ambulatory Assist Devices Exclusions and Non-Covered Indications
Four HCPCS codes are explicitly non-covered under CPB 0505. This is where your claims are most at risk.
E0117 — Articulating, spring-assisted underarm crutch. Aetna follows Medicare policy here. These crutches — two legs connected by a propulsion bar — are not considered medically necessary because their clinical value hasn't been established. If your patients are using this device, billing E0117 to Aetna will result in a claim denial.
Sit-and-stand walking assistant crutches. Same rationale. Aetna considers the clinical value unestablished. The Upsee mobility device falls into this category as well.
E0144 — Enclosed, four-sided framed walker with posterior seat. Non-covered.
E0152 — Battery-powered wheeled walker (Sully Walker). Non-covered.
E0156 — Seat attachment for walker. Non-covered.
One clarification worth noting: canes or crutches that contain a spring to reduce ground-impact vibration are not billed separately with a new code. They get coded with the standard cane or crutch codes. If your DME supplier is using a non-standard code for a spring-dampened device, fix that before January 5, 2026.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Standard canes and quad canes | Covered | E0100, E0105 | Three-part MRADL/safe use/functional resolution test required |
| Forearm crutches | Covered | E0110, E0111 | Same three-part test |
| Underarm crutches (wood) | Covered | E0112, E0113 | Same three-part test |
| Underarm crutches (non-wood) | Covered | E0114, E0116 | Same three-part test |
| Lower-leg platform crutch substitute (iWalkFree) | Covered | E0118 | Same three-part test |
| Articulating, spring-assisted underarm crutch | Not Covered | E0117 | Clinical value not established; mirrors Medicare policy |
| Sit-and-stand walking assistant crutch / Upsee device | Not Covered | — | Clinical value not established |
| Rigid pick-up walker | Covered | E0130 | Three-part MRADL test |
| Folding pick-up walker | Covered | E0135 | Three-part MRADL test |
| Trunk-support walker | Covered | E0140 | Three-part MRADL test |
| Rigid wheeled walker | Covered | E0141 | Three-part MRADL test |
| Folding wheeled walker | Covered | E0143 | Three-part MRADL test |
| Heavy-duty walker, multiple braking | Covered | E0147 | Three-part MRADL test |
| Heavy-duty walker, no wheels | Covered | E0148 | Three-part MRADL test |
| Heavy-duty walker, wheeled | Covered | E0149 | Three-part MRADL test |
| Combination wheeled walker with seat/transport chair | Covered | E0150 | Three-part MRADL test |
| Enclosed four-sided walker with posterior seat | Not Covered | E0144 | Not covered under CPB 0505 |
| Battery-powered wheeled walker (Sully Walker) | Not Covered | E0152 | Not covered under CPB 0505 |
| Seat attachment, walker | Not Covered | E0156 | Not covered under CPB 0505 |
| Pediatric gait trainers | Covered | E8000, E8001, E8002 | Pediatric size, all accessories included |
| Mulholland Walkabout | Covered | — | Impaired ambulation with insufficient trunk stability |
| Pediatric crawlers | Covered | — | For disabled children |
| Specially adapted strollers | Covered | — | Used in place of wheelchair for children |
| Standard strollers | Not Covered | — | Does not meet DME definition |
| Standing frame systems | Covered | E0638, E0641, E0642 | One-position, multi-position, and mobile |
| Rollabout chair (Rolleraid) | Covered | E1031 | Castors 5" or greater |
| Cane/crutch replacement accessories | Covered | A4635, A4636, A4637 | When base device meets criteria |
| Walker attachments and accessories | Covered | E0153, E0154, E0155, E0157, E0158, E0159 | When base walker meets criteria |
Aetna Ambulatory Assist Devices Billing Guidelines and Action Items 2026
| # | Action Item |
|---|---|
| 1 | Audit every open or pending claim with E0117, E0144, E0152, or E0156 before January 5, 2026. These codes are non-covered under CPB 0505. If you have claims in queue for Aetna members with these codes, pull them and assess whether an alternative covered code applies or whether you need to notify the patient of non-coverage before billing. |
| 2 | Document the three-part medical necessity test in the medical record for every cane, crutch, and walker claim. Your documentation must show MRADL impairment, safe device use, and that the specific device resolves the deficit. Aetna auditors will look for all three. One missing element is a clean path to denial. |
| 3 | Check prior authorization requirements by plan before submitting claims for high-cost devices. Pediatric gait trainers (E8000, E8001, E8002), standing frames (E0638, E0641, E0642), and heavy-duty walkers (E0147, E0148, E0149) carry higher reimbursement and higher audit risk. Confirm prior auth requirements with the specific Aetna plan before the effective date. |
| 4 | Re-code any spring-dampened cane or crutch claims using standard codes. If a device reduces ground-impact vibration via a spring mechanism, bill it under the existing cane or crutch code (E0100, E0105, E0110–E0116). No separate code is appropriate for that feature. |
| 5 | Update your charge capture and DME order templates to flag E0156 as non-covered. The seat attachment for walkers catches practices off guard — it sounds like a minor accessory, but Aetna explicitly excludes it. Remove it from any bundled walker order sets. |
| 6 | Train your billing team on the MRADL definition. The policy is specific: toileting, feeding, dressing, grooming, and bathing, in the home. Need that a patient uses a walker at work or in the community doesn't establish coverage. If your clinical documentation is pulling functional need from outpatient therapy notes focused on community mobility, that documentation won't satisfy CPB 0505. |
| 7 | For pediatric cases, distinguish between standard and specially adapted strollers in documentation. Aetna covers the latter as DME when it replaces a wheelchair. But the record must support that clinical rationale — "wheelchair substitute" must appear explicitly, not just be implied. |
If your organization bills a high volume of ambulatory assist device claims across pediatric and adult populations, loop in your compliance officer before the January 5, 2026 effective date. The intersection of pediatric gait trainers, standing frames, and non-covered walker variants creates enough complexity that a targeted internal audit is worth the time.
| 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 Ambulatory Assist Devices Under CPB 0505
Covered HCPCS Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| A4635 | HCPCS | Underarm pad, crutch, replacement, each |
| A4636 | HCPCS | Replacement, handgrip, cane, crutch, or walker, each |
| A4637 | HCPCS | Replacement, tip, cane, crutch, or walker, each |
| E0100 | HCPCS | Cane, includes canes of all materials, adjustable or fixed, with tip |
| E0105 | HCPCS | Cane, quad or three-prong, includes canes of all materials, adjustable or fixed, with tips |
| E0110 | HCPCS | Crutches, forearm, includes crutches of various materials, adjustable or fixed, pair, complete |
| E0111 | HCPCS | Crutch, forearm, includes crutches of various materials, adjustable or fixed, each, with tip and handgrip |
| E0112 | HCPCS | Crutches, underarm, wood, adjustable or fixed, pair, with pads, tips and handgrips |
| E0113 | HCPCS | Crutch, underarm, wood, adjustable or fixed, each, with pad, tip and handgrip |
| E0114 | HCPCS | Crutches, underarm, other than wood, adjustable or fixed, pair, with pads, tips and handgrips |
| E0116 | HCPCS | Crutch, underarm, other than wood, adjustable or fixed, with pad, tip, handgrip, with or without shoulder rest |
| E0118 | HCPCS | Crutch substitute, lower leg platform, with or without wheels, each (iWalkFree) |
| E0130 | HCPCS | Walker, rigid (pick-up), adjustable or fixed height |
| E0135 | HCPCS | Walker, folding (pickup), adjustable or fixed height |
| E0140 | HCPCS | Walker, with trunk support, adjustable or fixed height, any type |
| E0141 | HCPCS | Walker, rigid, wheeled, adjustable or fixed height |
| E0143 | HCPCS | Walker, folding, wheeled, adjustable or fixed height |
| E0147 | HCPCS | Walker, heavy duty, multiple braking system, variable wheel resistance |
| E0148 | HCPCS | Walker, heavy duty, without wheels, rigid or folding, any type, each |
| E0149 | HCPCS | Walker, heavy duty, wheeled, rigid or folding, any type |
| E0150 | HCPCS | Combination wheeled walker with seat and transport chair, folding, adjustable or fixed height |
| E0153 | HCPCS | Platform attachment, forearm crutch, each |
| E0154 | HCPCS | Platform attachment, walker, each |
| E0155 | HCPCS | Wheel attachment, rigid pick-up walker, per pair |
| E0157 | HCPCS | Crutch attachment, walker, each |
| E0158 | HCPCS | Leg extensions for walker, per set of four (4) |
| E0159 | HCPCS | Brake attachment for wheeled walker, replacement, each |
| E0638 | HCPCS | Standing frame system, one position (e.g., upright, supine or prone stander), any size including pediatric |
| E0641 | HCPCS | Standing frame system, multi-position (e.g., three way stander), any size including pediatric |
| E0642 | HCPCS | Standing frame system, mobile (dynamic stander), any size including pediatric |
| E1031 | HCPCS | Rollabout chair, any and all types with castors 5" or greater (Rolleraid) |
| E8000 | HCPCS | Gait trainer, pediatric size, posterior support, includes all accessories and components |
| E8001 | HCPCS | Gait trainer, pediatric size, upright support, includes all accessories and components |
| E8002 | HCPCS | Gait trainer, pediatric size, anterior support, includes all accessories and components |
Not Covered / Experimental Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| E0117 | HCPCS | Crutch, underarm, articulating, spring assisted, each | Clinical value not established; mirrors Medicare non-coverage |
| E0144 | HCPCS | Walker, enclosed, four sided framed, rigid or folding, wheeled with posterior seat | Not covered under CPB 0505 |
| E0152 | HCPCS | Walker, battery powered, wheeled, folding, adjustable or fixed height (Sully Walker) | Not covered under CPB 0505 |
| E0156 | HCPCS | Seat attachment, walker | Not covered under CPB 0505 |
Key ICD-10-CM Diagnosis Codes
| Code | Description |
|---|---|
| G11.0–G11.9 | Hereditary ataxia |
| G12.0–G12.9 | Spinal muscular atrophy and related syndromes |
| G13.0–G13.8 | Systemic atrophies primarily affecting the central nervous system in diseases classified elsewhere |
| G14 | Postpolio syndrome |
| G24.1 | Genetic torsion dystonia |
| G31.9 | Degenerative disease of nervous system, unspecified |
| G71.0–G71.9 | Muscular dystrophy |
These ICD-10 codes represent the neurological and neuromuscular diagnoses most commonly paired with ambulatory assist device claims. Ambulatory assist devices billing with these diagnoses needs tight clinical documentation — especially for muscular dystrophy (G71.x) and hereditary ataxia (G11.x), where functional decline can be gradual and documentation sometimes lags the clinical picture.
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