Summary & Overview
HCPCS Level II L5828: Endoskeletal Knee-Shin Addition, Fluid Swing and Stance Control
HCPCS Level II code L5828 designates an addition to an endoskeletal knee-shin prosthetic system that provides single-axis, fluid swing and stance phase control. This component is relevant nationally to prosthetic clinicians, durable medical equipment suppliers, and payers because it affects functional mobility for lower-limb amputees and can influence coverage decisions, medical necessity review, and cost of care for ambulatory prosthetic services. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find a concise overview of what L5828 represents clinically and operationally, how major payers approach coverage and reimbursement for prosthetic components, and benchmark considerations for utilization and billing. The publication summarizes common billing practices, typical sites of service, and the clinical context in which a fluid swing-and-stance control knee-shin addition is used. It also highlights where data is available and where input is limited. This briefing is intended to inform provider billing teams, prosthetics program managers, and policy analysts about the code’s purpose, expected service setting, and payer landscape at a national level.
Billing Code Overview
HCPCS Level II code L5828 describes an addition to an endoskeletal knee-shin system that provides single-axis, fluid swing and stance phase control. This device component is used as part of a prosthetic lower-limb system designed to manage knee and shin movement dynamics during gait.
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Service type: Prosthetic component insertion or fitting as an addition to an existing endoskeletal knee-shin prosthesis
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Typical site of service: Prosthetics and orthotics clinics, specialty prosthetic provider offices, or outpatient rehabilitation settings
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Clinical & Coding Specifications
Clinical Context
A 54-year-old male transtibial amputee with a healed residual limb and chronic knee instability from a previous traumatic amputation is evaluated for prosthetic component upgrades. The multidisciplinary limb team (physiatrist, prosthetist, and physical therapist) determines the patient would benefit from an endoskeletal knee-shin system providing single-axis control with fluid swing and stance phase modulation to improve gait symmetry and safety. The prosthetist orders the component, documents baseline gait assessment, and obtains prior authorization from Medicare or the patients commercial payer. On delivery day in the outpatient prosthetics clinic (or ambulatory surgery/prosthetics lab if fitting requires sterile conditions), the prosthetist fits the L5828 knee-shin unit into the patients existing prosthesis, aligns the knee axis, and performs dynamic tuning during gait training. Follow-up visits with the prosthetist and physical therapist occur at 1 week, 4 weeks, and as clinically indicated to adjust hydraulic resistance and stance control settings. Billing uses the HCPCS Level II code L5828 with applicable modifiers for laterality, supplier type, or unusual circumstances; supporting clinical documentation includes residual limb status, functional mobility goals, gait assessment, and payer authorization details.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT |