Summary & Overview
HCPCS L5331: Hip Disarticulation Prosthesis, Canadian Molded Socket
HCPCS Level II code L5331 represents a custom-molded, endoskeletal prosthetic system for individuals with hip disarticulation, featuring a Canadian-type molded socket, a hip joint, a single-axis knee, and a SACH foot. This code captures a complex, high-cost prosthetic device that is clinically significant for restoring mobility and function after high-level lower-extremity amputation. National attention centers on appropriate device selection, coverage criteria, and the resource intensity of fabrication and fitting.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a national overview of coverage considerations and typical payment contexts for this category of prosthesis.
Readers will learn what the code denotes clinically and functionally, how it is typically delivered in care settings, and what to expect in payer coverage and billing practice. The report outlines common benchmarking metrics and policy considerations relevant to durable medical equipment and prosthetic services, along with practical notes on service lines and sites where these devices are provided. Data not available in the input are noted where applicable.
Billing Code Overview
HCPCS Level II code L5331 describes a hip disarticulation, Canadian type, molded socket, endoskeletal system prosthesis with a hip joint, single axis knee, and SACH foot. This device is a custom-molded lower-limb prosthetic system intended for patients following hip disarticulation or hemipelvectomy-level amputation.
Service type: Prosthetic limb fabrication and fitting
Typical site of service: Orthotics and prosthetics clinic, hospital prosthetics department, or specialized rehabilitation facility
Clinical & Coding Specifications
Clinical Context
A 54-year-old male with a transfemoral oncologic amputation at the level of hip disarticulation presents to a tertiary prosthetics clinic for delivery and fitting of a definitive prosthesis. The prescription is for a Canadian-style molded socket with an endoskeletal framework, integrated hip joint, single-axis knee, and SACH (solid ankle cushion heel) foot — described by billing code L5331. The workflow includes pre-fitting evaluation (residual limb assessment, contralateral limb and pelvic alignment, skin integrity, and functional goals), measurement and casting or digital scanning of the hip disarticulation residual limb, fabrication of a custom molded socket and endoskeletal pylon, bench alignment and assembly of the hip and knee components with the SACH foot, followed by a prosthetic fitting visit for initial alignment, gait training with a physical therapist, progressive adjustments for comfort and function, and a follow-up program for socket refitting and component maintenance. Typical settings include outpatient prosthetics clinics, hospital-based prosthetic departments, or specialized rehabilitation centers. Typical patient needs include seated stability, pelvic control, transfer and gait training with assistive devices, and caregiver training for transfers and skin checks. Payers commonly involved include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare for authorization and reimbursement processes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT |