Continuous Passive Motion (CPM) Machines — CPB 0010 | AETNA Coverage Update

TL;DR: Aetna modified CPB 0010 governing continuous passive motion (CPM) machine coverage, effective March 7, 2026. Here's what billing teams need to act on now.

Aetna CPB 0010 sets the rules for when CPM machines qualify as covered durable medical equipment. This modified coverage policy defines criteria around timing, duration, and qualifying surgical indications. If your team bills CPM devices post-orthopedic surgery—especially after total knee arthroplasty (CPT 27486, 27487) or cartilage procedures—this change directly affects your reimbursement and your risk of claim denial.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna
Policy	Continuous Passive Motion (CPM) Machines
Policy Code	CPB 0010
Change Type	Modified
Effective Date	March 7, 2026
Impact Level	High
Specialties Affected	Orthopedic Surgery, Physical Medicine & Rehabilitation, DME Suppliers, Sports Medicine
Key Action	Audit all active CPM authorizations and confirm each meets the covered indications and the 2-day post-op initiation requirement before billing

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Aetna CPM Machine Coverage Criteria and Medical Necessity Requirements 2026

The Aetna CPM machine coverage policy recognizes five categories of medical necessity. All five require the device to be used as durable medical equipment—not as a standalone treatment. Know which bucket your patient falls into before you bill.

Category 1: Total Knee Arthroplasty (TKA) and Revision TKA
CPM is covered as an adjunct to active physical therapy after primary or revision TKA (CPT 27486 and 27487). The word "adjunct" matters here. If the patient isn't enrolled in an ongoing PT program, the medical necessity argument collapses.

Category 2: Surgical Release of Arthrofibrosis, Adhesive Capsulitis, or Manipulation Under Anesthesia
CPM is covered for any joint—knee, shoulder, or elbow being the most common sites—until the member begins active PT. Once PT starts, coverage ends under this indication.

Category 3: Cartilage Procedures During Non-Weight-Bearing Recovery
This is the broadest category and the one most likely to trip up billing teams. Covered procedures include:

Coverage runs only through the non-weight-bearing period. The moment the patient enters the weight-bearing phase of recovery, CPM billing must stop. Document that transition date carefully—this is exactly the kind of gap that triggers claim denial.

Category 4: Members Who Can't Benefit Optimally from Active PT
Covered for members with Dupuytren's contracture, extensive tendon fibrosis, mental and behavioral disorders, or reflex sympathetic dystrophy. These cases require clear documentation linking the specific condition to the patient's inability to fully participate in active PT.

Category 5: Members Unable to Undergo Active PT
A separate category from Category 4. This covers total inability to participate, not just reduced participation. The distinction matters for your clinical documentation.

The Hard Timing Rules
CPM use must begin within two days of surgery to meet medical necessity. Not three days. Not after the weekend. Two days. The standard duration Aetna recognizes is 7 to 10 days. Extended use up to 21 days can be considered on an individual basis—but you need to request it. Beyond 21 days post-op, Aetna's position is unambiguous: the medical literature does not support it, and coverage will not extend there.

If your facility routinely delivers CPM devices on post-op day three because of logistics, that's a billing exposure problem. Fix the delivery timeline or document why the delay occurred and whether a prior authorization exception applies.

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Aetna CPM Machine Exclusions and Non-Covered Indications

Aetna's exclusion list is long, specific, and worth printing out for your orthopedic billing team. These are considered experimental, investigational, or unproven under this coverage policy:

The real issue here is the shoulder and hip surgery exclusions. Surgeons regularly prescribe CPM after rotator cuff repairs and hip arthroscopies. Aetna will deny those claims. If your orthopedic group sees high volumes of these procedures, your team is likely sitting on denials right now. Pull your CPM claims from the last 90 days and cross-check them against this list.

One more billing note: the sheepskin pad used with CPM machines is considered integral to the device. Bill it separately and Aetna will deny it. Don't bill it separately.

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Coverage Indications at a Glance

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Aetna CPM Machine Billing Guidelines and Action Items 2026

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for CPM Machines Under CPB 0010

CPT Codes — Covered Indications

CPM is medically necessary as an adjunct to ongoing PT after revision TKA, provided use begins within 2 days post-op.

Code	Description Copy
27486	Revision of total knee arthroplasty, with or without allograft; one component
27487	Revision of total knee arthroplasty, with or without allograft; femoral and entire tibial component

CPT Codes — Not Covered for Indications Listed in CPB 0010

Code	Description Copy
24149	Radical resection of capsule, soft tissue, and heterotopic bone, elbow, with contracture release

CPT Codes — Other Codes Related to CPB 0010

These codes appear in the policy as related procedures. CPM is not a covered adjunct for these indications.

Note: The full policy data references 93 total CPT codes and additional codes beyond what is shown above. Access the complete code list at app.payerpolicy.org/p/aetna/0010.

The policy data provided does not include specific HCPCS codes for CPM machine billing (such as E1800-series DME codes). Verify current HCPCS coding for CPM devices directly with your DME supplier or MAC. The policy also references 137 ICD-10-CM codes; the full list is available in the source policy document.

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