Summary & Overview
HCPCS E0935: Continuous Passive Motion Device for Knee
HCPCS Level II code E0935 designates a continuous passive motion (CPM) device intended for knee-only use. CPM devices are used to provide controlled passive movement of the knee joint, commonly in postoperative rehabilitation to preserve range of motion and reduce stiffness. Nationally, billing and coverage for DME items such as CPM devices affect post-acute care patterns and prosthetic/rehabilitative pathways for joint surgery patients.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the device’s clinical role and the payer landscape, plus information on coverage benchmarks, coding practice considerations, and relevant policy updates where available. The publication outlines typical sites of service and the service type classification to inform billing and revenue-cycle teams, clinicians, and compliance staff.
This summary addresses what E0935 represents, why accurate coding matters for reimbursement and utilization tracking, and what to expect in payer interactions and documentation requirements. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code E0935 describes a continuous passive motion exercise device for use on the knee only. The service type is durable medical equipment (DME) — therapeutic exercise device, intended to provide passive range-of-motion therapy to the knee joint. The typical site of service is outpatient settings or patient home, where the device is used for postoperative rehabilitation or to maintain joint mobility following injury or surgery.
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 58-year-old who underwent total knee arthroplasty (TKA) for advanced osteoarthritis and is discharged home with a continuous passive motion (CPM) device for the knee. The orthopedic surgeon orders a E0935 device to support early postoperative range-of-motion exercises to limit joint stiffness and promote recovery. The clinical workflow includes device order entry in the hospital or outpatient surgical center record, device delivery to the patient prior to discharge or at an early postoperative clinic visit, patient/caregiver instruction on safe use and settings, and scheduled follow-up with the surgeon or physical therapist to document progress and determine duration of use. Durable medical equipment billing staff attach the appropriate diagnosis and applicable modifier(s) and submit the claim to the patient’s insurer. Typical payors include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, BUCA, and Medicare. Common concurrent clinical activities include wound checks, pain management adjustments, and outpatient physical therapy evaluations.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when services related to device provision required substantially greater work, such as complex patient education or multiple home visits for setup. |