L5666 – Addition to lower extremity, below knee, cuff suspension
HCPCS Level II code · L codes: Orthotic and Prosthetic Procedures and Devices
HCPCS codeL5666
- Long description
- Addition to lower extremity, below knee, cuff suspension
- Short description
- Below knee cuff suspension
- Pricing indicator
38Orthotics, prosthetics, prosthetic devices & vision services- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
D1FProsthetic/Orthotic devices- Added
- January 1, 1986
- Last change
- January 1, 1996 – No change
Frequently asked questions
What is HCPCS code L5666?
L5666 is a HCPCS Level II code for addition to lower extremity, below knee, cuff suspension.
Does Medicare cover L5666?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby L codes
- L5653 – Addition to lower extremity, knee disarticulation, expandable wall socket
- L5654 – Addition to lower extremity, socket insert, symes, (kemblo, pelite, aliplast, plastazote or equal)
- L5655 – Addition to lower extremity, socket insert, below knee (kemblo, pelite, aliplast, plastazote or equal)
- L5656 – Addition to lower extremity, socket insert, knee disarticulation (kemblo, pelite, aliplast, plastazote or equal)
- L5657 – Addition to lower extremity prosthesis, manual/automated adjustable air, fluid, gel or equal socket insert for limb volume management, any materials
- L5658 – Addition to lower extremity, socket insert, above knee (kemblo, pelite, aliplast, plastazote or equal)
- L5661 – Addition to lower extremity, socket insert, multi-durometer symes
- L5665 – Addition to lower extremity, socket insert, multi-durometer, below knee
- L5668 – Addition to lower extremity, below knee, molded distal cushion
- L5670 – Addition to lower extremity, below knee, molded supracondylar suspension ('pts' or similar)
- L5671 – Addition to lower extremity, below knee / above knee suspension locking mechanism (shuttle, lanyard or equal), excludes socket insert
- L5672 – Addition to lower extremity, below knee, removable medial brim suspension
- L5673 – Addition to lower extremity, below knee/above knee, custom fabricated from existing mold or prefabricated, socket insert, silicone gel, elastomeric, or equal, with or without perforations, with or without breathable material, for use with locking mechanism
- L5676 – Additions to lower extremity, below knee, knee joints, single axis, pair
- L5677 – Additions to lower extremity, below knee, knee joints, polycentric, pair
- L5678 – Additions to lower extremity, below knee, joint covers, pair
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.