Summary & Overview
HCPCS L2037: Knee Ankle Foot Orthosis, Full Plastic, Single Upright
HCPCS Level II code L2037 identifies a custom-fabricated knee ankle foot orthosis (KAFO) constructed of full plastic with a single upright, with optional free motion knee and/or ankle components. This code is used for custom lower-extremity orthotic devices that provide comprehensive support for the knee, ankle, and foot and is relevant across inpatient referral and outpatient orthotics and durable medical equipment networks nationally. Its use affects payments for prosthetic and orthotic services and has implications for DME supplier billing, medical necessity reviews, and device durability considerations.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a national-oriented overview of how L2037 is defined, the typical clinical contexts for its use, and the service and site settings where the device is provided. The publication outlines benchmark topics such as common coverage determinations, documentation elements typically reviewed for medical necessity, coding relationships to other orthotic items, and areas where payer policies commonly vary. Data not available in the input is noted where specific benchmarks, fee schedules, or payer policy text would otherwise be referenced.
Billing Code Overview
HCPCS Level II code L2037 describes a knee ankle foot orthosis (KAFO), full plastic, single upright, which may be supplied with or without a free motion knee and with or without a free motion ankle. The item is custom fabricated, indicating molding or shaping to the individual patient.
Service type: Custom-fabricated lower-extremity durable medical equipment/prosthetic-orthotic device.
Typical site of service: Outpatient orthotics clinic, prosthetics/orthotics (P&O) facility, or durable medical equipment (DME) supplier setting.
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with post-stroke left lower-extremity weakness presents to an orthotics clinic for evaluation of gait instability and knee hyperextension during stance. The orthotist performs a full assessment including gait observation, range of motion, lower-extremity muscle strength testing, and measurement of limb shape and skin integrity. After multidisciplinary review with the treating physiatrist, a custom-fabricated full-plastic knee-ankle-foot orthosis (KAFO) with a single lateral upright and an optional free-motion knee or ankle is ordered to provide knee stability during stance while allowing controlled knee flexion during swing. The orthotist obtains a prescription detailing the functional goals, performs casting or digital scanning, documents medical necessity and prior conservative management, and fabricates the device in a lab. The patient returns for fitting, in-office adjustments, gait training with a physical therapist, and follow-up for progressive alignment and skin checks. Billing uses the HCPCS Level II code L2037 with applicable modifiers to reflect laterality, place of service, or unusual procedural circumstances.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT | Left side | Use when the orthosis is fabricated for the left lower extremity |