Summary & Overview
HCPCS L5716: Exoskeletal Knee-Shin Addition, Polycentric, Stance Phase Lock
HCPCS Level II code L5716 denotes an addition to an exoskeletal knee-shin system that is polycentric and includes a mechanical stance phase lock. This code identifies a specific prosthetic/orthotic component intended to provide enhanced knee stability during the stance phase of gait for lower-extremity orthosis or prosthesis users. Nationally, accurate coding for assistive limb components like L5716 affects coverage determinations, claim adjudication, and durable medical equipment (DME) reimbursement.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what L5716 represents clinically and operationally, plus insights into payer coverage patterns, common billing modifiers used with similar HCPCS Level II orthotic components, and benchmarking considerations where available. The publication also outlines clinical context for use of polycentric knee mechanisms with mechanical stance phase locks and typical sites of service where these components are furnished.
This summary equips clinicians, billing specialists, and policy analysts with the foundational information needed to classify and document claims for L5716, understand payer relevance, and locate more detailed benchmarking and policy materials elsewhere in the publication. Data not available in the input will be noted in relevant sections.
Billing Code Overview
HCPCS Level II code L5716 describes an addition to an exoskeletal knee-shin system that is polycentric and includes a mechanical stance phase lock. This is an orthopedic prosthetic component designed to provide knee stability during the stance phase for patients using an exoskeletal knee-shin orthosis or prosthesis.
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Service type: Prosthetic/orthotic component addition for lower extremity knee-shin system
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Typical site of service: Durable medical equipment provider, orthotics/prosthetics clinic, or outpatient rehabilitation setting
Clinical & Coding Specifications
Clinical Context
A 52-year-old patient with a transtibial amputation and a history of knee instability during stance presents for prosthetic component optimization. The patient ambulates with a conventional exoskeletal prosthetic foot and socket but demonstrates a risk of knee collapse during weight-bearing on the prosthetic side, particularly when standing from a seated position and during uneven terrain. The prosthetist evaluates gait, stance stability, and socket fit, and determines that adding a polycentric exoskeletal knee-shin system with a mechanical stance phase lock will improve stance stability and reduce fall risk. The service consists of selecting and adding the mechanical polycentric knee-shin assembly to the existing exoskeletal prosthesis, aligning and adjusting the lock engagement, performing static and dynamic alignment checks, and providing patient education on use and maintenance. Typical site of service is an outpatient prosthetics clinic or orthotics and prosthetics facility where the prosthetist performs the addition, fitting, and functional testing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Physician or other qualified health care professional service | Use when a physician performs or directly supervises the addition or fitting in contexts where physician involvement is billed. |
22 |