Summary & Overview
HCPCS K0901: Knee Orthosis, Single Upright, Prefabricated
HCPCS Level II code K0901 covers a prefabricated, off-the-shelf knee orthosis with a single upright spanning thigh and calf and an adjustable flexion-extension joint, offering medial-lateral, rotational control and optional varus/valgus adjustment. This orthosis addresses knee instability, alignment issues, and post-injury or post-operative support needs, making it relevant across orthopedic, rehabilitative, and durable medical equipment (DME) care pathways nationally.
Key payers in the national landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and prior authorization requirements vary by payer and plan, influencing access to prefabricated knee orthoses and the setting in which they are dispensed.
Readers will find a concise clinical and billing overview of what K0901 represents, typical service settings where the orthosis is provided, and the payer mix commonly involved. The publication also outlines benchmarking and policy considerations relevant to DME and orthotics reimbursement, common documentation elements that support medical necessity, and the clinical contexts in which a prefabricated single-upright knee orthosis is typically used. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code K0901 describes a knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), with medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated, off-the-shelf. The device is designed to provide joint support and control for knee stability, alignment, and motion limitation.
Service type: Orthotic device provision and fitting
Typical site of service: Outpatient orthotics or durable medical equipment (DME) provider clinics, prosthetics and orthotics centers, or outpatient rehabilitation settings
Clinical & Coding Specifications
Clinical Context
A 68-year-old ambulatory patient with symptomatic medial compartment knee osteoarthritis presents to an orthopedic clinic complaining of activity-related knee pain and intermittent instability. Conservative measures including NSAIDs, physical therapy, and activity modification provided limited relief. The orthopedist assesses alignment, range of motion, and ligamentous stability, determines the patient is not an immediate surgical candidate, and prescribes a prefabricated single‑upright knee orthosis with an adjustable flexion/extension joint for medial‑lateral and rotational control (K0901). The durable medical equipment (DME) supplier verifies measurements, performs a fitting in the clinic or outpatient DME clinic, educates the patient on donning/doffing, joint adjustment, skin inspection, and a progressive wear schedule. Follow‑up occurs within 2–6 weeks to reassess fit, comfort, and symptom response, and again as clinically indicated for adjustments or replacement. Typical sites of service include outpatient orthopedic clinics, hospital outpatient departments, ambulatory surgery centers for fittings adjacent to procedures, and durable medical equipment supplier clinics.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
59 | Distinct procedural service | Use when reporting a separately identifiable DME-related procedure or service performed the same day as another reportable service when clinical documentation supports distinctness. |