Summary & Overview
HCPCS L5610: Above-Knee Endoskeletal Prosthetic Addition, Hydracadence System
HCPCS Level II code L5610 denotes an addition to an endoskeletal above-knee (transfemoral) prosthetic system incorporating a hydracadence mechanism. Nationally, this code identifies a specific prosthetic component used in complex above-knee prostheses and matters for benefit design, prosthetic coverage policies, and supply-chain coding consistency.
Key payers in the landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for L5610, the typical site of service for fitting and fabrication, and the payer mix most likely to cover such components. The publication outlines common billing modifiers associated with prosthetic device claims, notes where data was not provided, and summarizes the policy and coding considerations that influence coverage and billing workflows.
The report provides benchmarks and practical coding reference points for revenue cycle and clinical teams, highlights policy nuances that affect prior authorization and durable medical equipment processes, and identifies areas where additional documentation or supplier justification is commonly required. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code L5610 describes an addition to a lower extremity endoskeletal prosthetic system, above knee, hydracadence system. This code represents a component used in above-knee prostheses that is part of an endoskeletal assembly and incorporates a hydracadence mechanism.
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Service type: Prosthetic component addition for above-knee (transfemoral) lower extremity prosthesis
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Typical site of service: Orthotics and prosthetics clinic, prosthetic fabrication lab, outpatient rehabilitation facility
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a left above-knee amputation presents for prosthetic component augmentation. The patient has an established endoskeletal transfemoral prosthesis and requires an addition to the lower extremity endoskeletal system for improved suspension and shock attenuation using a hydraulic/cadence (hydracadence) unit. The typical workflow includes: initial prosthetist evaluation and measurement, selection of the L5610 hydracadence module compatible with the existing endoskeletal pylon and socket, procurement authorization, fabrication/fitment in the prosthetics lab, and a follow-up clinic visit for alignment tuning and gait training. Typical site of service is an outpatient prosthetics clinic or orthotics/prosthetics facility with adjunct visits to physical therapy for gait training. Common clinical goals include improved gait symmetry, cadence modulation, and reduction of socket forces that contribute to skin breakdown and discomfort.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Primary procedure | Used when this prosthetic addition is the primary service on the claim |
22 |