Summary & Overview
HCPCS L5160: Knee Disarticulation Molded Socket with Bent Knee and SACH Foot
HCPCS Level II code L5160 denotes a molded socket prosthesis for a knee disarticulation (through-knee) amputation configured with an external bent knee joint, shin component, and a SACH (solid ankle cushioned heel) foot. This code is used to bill for a complete custom prosthetic assembly addressing limb loss at or through the knee, an important category of durable medical equipment and prosthetic services with implications for mobility, rehabilitation outcomes, and long-term functional independence nationwide.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for L5160, typical sites of service where the prosthesis is delivered and adjusted, and the common billing environment for lower-limb prosthetic fabrication and fitting. The publication also summarizes benchmarking and coverage themes relevant to this code, highlights policy and coding considerations that affect reimbursement and documentation, and provides practical reference material for clinical and billing teams. Data not available in the input for associated taxonomies, specific ICD-10 pairings, and related codes are noted where appropriate.
Billing Code Overview
HCPCS Level II code L5160 describes a knee disarticulation (through-knee) prosthetic socket with a molded socket, bent knee configuration, external knee joints, shin, and sach foot. This represents a custom lower-limb prosthetic assembly designed for patients with an amputation through the knee (knee disarticulation) or equivalent residual limb.
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Service type: Prosthetic lower-limb socket and components (custom molded transtibial/knee-disarticulation prosthesis)
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Typical site of service: Orthotics and prosthetics clinic, prosthetic fabrication lab, inpatient rehabilitation facility, or outpatient prosthetics fitting and adjustment setting
Clinical & Coding Specifications
Clinical Context
A 62-year-old male with a transtibial limb ischemia history presents after progressive peripheral arterial disease and recurrent nonhealing infection of the distal tibia and ankle. Surgical team performs a knee disarticulation (through-knee amputation) with a molded socket prosthetic plan. The prosthetist fabricates a molded socket in a bent knee configuration with external knee joints, a reinforced shin section, and a SACH foot to restore weight-bearing surfaces and ambulation.
Pre-procedure workflow includes vascular and orthopedic evaluation, wound care and infection control, pre-prosthetic planning with the prosthetist to document limb shape and expected socket alignment, and baseline functional assessment (gait, transfers). Postoperative care includes wound monitoring, residual limb shaping, shrinker or immediate postoperative dressing, prosthetic fitting sessions for socket casting or scanning, bench alignment of external knee joints, and progressive gait training with physical therapy. Follow-up includes socket adjustments, component tuning (knee friction or locking adjustments), and periodic replacement of the SACH foot and shin components as clinically indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier used (default) | Applied when no specific modifier is required or applicable. |