Summary & Overview
HCPCS L5940: Addition to Endoskeletal Below-Knee Prosthesis, Ultra-Light Material
HCPCS Level II code L5940 designates an addition to an endoskeletal below-knee prosthetic system manufactured from ultra-light materials such as titanium or carbon fiber. This code is used to report a component added to an existing transtibial (below-knee) prosthesis, reflecting advances in lightweight materials that can improve functional mobility and patient comfort. Nationally, utilization of specialized prosthetic components has implications for cost, access to advanced materials, and durable medical equipment policy.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines typical coverage considerations, coding context, and payer-specific policy trends where available. Readers will gain a concise clinical and billing overview of L5940, understand which settings typically supply and fit these components, and find guidance on common documentation elements and service-line placement. Benchmarks, policy updates, and practical coding notes are summarized to inform providers, billing staff, and administrators responsible for prosthetic device submission and claims adjudication.
Data not available in the input for specific payer rates, associated taxonomies, ICD-10 pairings, and related codes is noted where applicable in detailed sections.
Billing Code Overview
HCPCS Level II code L5940 describes an addition to an endoskeletal below-knee prosthetic system constructed from ultra-light materials such as titanium or carbon fiber (or equivalent). The code applies to components that are added to an existing below-knee endoskeletal prosthesis to enhance function or structural properties.
Service Type: Prosthetic component assembly / addition to endoskeletal below-knee prosthesis
Typical Site of Service: Outpatient prosthetics clinic, orthotics and prosthetics (O&P) facility, or ambulatory surgical center
Clinical & Coding Specifications
Clinical Context
A 56-year-old patient with a transtibial (below-knee) amputation presents for fabrication and fitting of an endoskeletal prosthetic component made of ultra-light material (titanium or carbon fiber) to improve mobility, reduce energy expenditure, and decrease socket strain. The clinical workflow includes a prosthetist evaluation with measurement and casting or digital scanning of the residual limb, trialing of a temporary pylon/suspension, ordering the L5940 endoskeletal addition specifying ultra-light material, receipt and inspection of the fabricated component, prosthetic assembly and alignment in the clinic, and follow-up gait training with a physical therapist. Typical sites of service are outpatient prosthetics clinics, orthotics and prosthetics facilities, and hospital-based prosthetics departments. Common clinical indications include healed transtibial amputation due to peripheral vascular disease, trauma, or tumor, with goals of restoring function and reducing prosthetic weight to improve patient endurance and balance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT | Left side | Use when the endoskeletal addition is for the left lower extremity prosthesis |
RT |