Occupational Therapy Services — CPB 0250 | AETNA Coverage Update

TL;DR: Aetna, a CVS Health company, modified CPB 0250 governing occupational therapy services, effective January 5, 2026. If your team bills CPT 97165–97168, 97535, or 97140 for Aetna members, review the updated medical necessity criteria now.

Aetna's occupational therapy coverage policy under CPB 0250 sets the rules for when OT services get paid — and when they don't. This update touches every code in your OT charge capture: CPT 97165, 97166, 97167, and 97168 for evaluations, CPT 97535 for ADL training, CPT 97140 for manual therapy, and HCPCS codes including G0129, G0152, G0160, and S9129 for home health and PACE settings. Understanding exactly what Aetna requires is the difference between clean claims and a wave of preventable denials.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Occupational Therapy Services
Policy Code	CPB 0250
Change Type	Modified
Effective Date	January 5, 2026
Impact Level	High
Specialties Affected	Occupational therapy, physical medicine & rehabilitation, home health, PACE programs, skilled nursing
Key Action	Audit your OT claims documentation against CPB 0250's five-part medical necessity criteria before billing Aetna for any OT service after January 5, 2026

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Aetna Occupational Therapy Coverage Criteria and Medical Necessity Requirements 2026

Aetna's occupational therapy coverage policy under CPB 0250 is built on a clear premise: OT is covered only when there is a reasonable expectation of measurable improvement in a defined, predictable period. That standard runs through every criterion in this policy.

The Five Medical Necessity Criteria

To get reimbursement for CPT 97165–97168, 97535, or 97140, your documentation needs to satisfy all five of these requirements — not four of five, all five.

1. Significant improvement within one month. The treating physician or licensed practitioner must determine that the member's condition can improve significantly based on objective measures within one month of therapy starting. Alternatively, the services must be necessary to establish a safe and effective maintenance program the member will carry out independently.

2. Reasonable expectation of significant improvement. OT coverage applies only when there is a clear expectation that the member's condition will improve significantly in a reasonable and generally predictable period. Plateau cases don't qualify. Neither do maintenance-only situations once the maintenance program is established.

3. Physician order and licensed provider. A physician or licensed health care practitioner must order OT services. The services must be performed by a duly licensed and certified OT provider, within the applicable scope of practice for their licensed jurisdiction.

4. Complexity requiring a licensed professional. Services must be complex enough to require a licensed therapist — or someone under their direct supervision, as permitted by state law. Physicians may supervise OT personnel under state law, but they cannot directly supervise OT assistants, since physicians are not licensed as occupational therapists.

5. Written plan of care. OT must follow an ongoing, written plan of care reviewed and approved by the treating physician. The plan must include sufficient objective and subjective data to show medical necessity. Generic plans won't hold up on audit.

Home-Based OT

Home-based OT — billed under HCPCS G0152, G0160, and S9129 — requires the member to be homebound. Aetna treats it as a case management transition tool, typically used when moving a member from hospital to home. If you're billing HCPCS S9129 (per diem home OT), confirm homebound status is documented in the record before you bill.

One detail that trips up billing teams: in Aetna's HMO and QPOS plans, home-based OT visits count toward the 60-day rehabilitation benefit limit. Check the specific benefit plan description before assuming unlimited visits apply.

Prior Authorization

This policy does not specify a universal prior authorization requirement for all OT services, but prior auth requirements vary by plan type. Always verify prior authorization requirements for the specific Aetna product before scheduling OT services — HMO products routinely require it.

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Aetna Occupational Therapy Exclusions and Non-Covered Indications

The policy is direct about when OT is not covered. Know these cold — they're your most common claim denial triggers.

Maximal therapeutic benefit reached. Once a member hits their maximum therapeutic benefit, or once a home program can carry the gains forward, continued supervised OT is not medically necessary. Document the transition point explicitly in the record.

No progression. OT for members whose condition is neither improving nor regressing is not covered. This is the plateau rule. If your clinician's notes show static functional scores across multiple visits with no documented rationale for continued skilled care, Aetna will deny.

Asymptomatic members. OT for members without an identifiable clinical condition or who are asymptomatic is not covered. This sounds obvious, but it surfaces in wellness-adjacent programs and prevention-focused billing.

These three exclusions are the backbone of Aetna's OT denial logic. If your claim doesn't demonstrate active, measurable progress toward a specific functional goal tied to a covered diagnosis, expect the denial.

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Coverage Indications at a Glance

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Aetna Occupational Therapy Billing Guidelines and Action Items 2026

Here's what your billing team needs to do before January 5, 2026 and immediately after.

Copy Action Items

If your practice serves a high volume of Aetna HMO members and bills G0152 or S9129 for home-based OT, talk to your compliance officer about the 60-day limit aggregation rule before the effective date. That's a benefit coordination issue that can produce retroactive denials.

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CPT, HCPCS, and ICD-10 Codes for Occupational Therapy Under CPB 0250

Covered CPT Codes (When Selection Criteria Are Met)

Covered HCPCS Codes (When Selection Criteria Are Met)

Other HCPCS Codes Related to CPB 0250

Code	Type	Description Copy
G0158	HCPCS	Services performed by a qualified occupational therapist assistant in the home health or hospice setting, each 15 minutes
G2169	HCPCS	Services performed by an occupational therapist assistant in the home health setting in the delivery of a safe and effective occupational therapy maintenance program

Key ICD-10-CM Diagnosis Codes

Note: The full policy lists 124 ICD-10-CM codes. The codes above represent the primary diagnostic categories. Pull the complete list from CPB 0250 directly at app.payerpolicy.org/p/aetna/0250 to verify every applicable diagnosis before billing.

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