HCPCS Level II · Orthotic and prosthetic procedures and devices
L5646Addition to lower extremity, below knee, air, fluid, gel or equal, cushion socket
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Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About L5646
L5646 is an HCPCS Level II code in the L series (orthotic and prosthetic procedures and devices), describing addition to lower extremity, below knee, air, fluid, gel or equal, cushion socket.
It was added to HCPCS effective 01/01/1986, and its current record took effect 01/01/2004.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Below knee cushion socket
- Date added
- 01/01/1986
- Action effective
- 01/01/2004
- BETOS
- D1F
Related L56xx codes
- L5600Preparatory, hip disarticulation-hemipelvectomy, pylon, no cover, sach foot, laminated socket, molded to patient model
- L5610Addition to lower extremity, endoskeletal system, above knee, hydracadence system
- L5611Addition to lower extremity, endoskeletal system, above knee - knee disarticulation, 4 bar linkage, with friction swing phase control
- L5613Addition to lower extremity, endoskeletal system, above knee-knee disarticulation, 4 bar linkage, with hydraulic swing phase control
- L5614Addition to lower extremity, exoskeletal system, above knee-knee disarticulation, 4 bar linkage, with pneumatic swing phase control
- L5615Addition, endoskeletal knee-shin system, 4 bar linkage or multiaxial, fluid swing and stance phase control
- L5616Addition to lower extremity, endoskeletal system, above knee, universal multiplex system, friction swing phase control
- L5617Addition to lower extremity, quick change self-aligning unit, above knee or below knee, each
- L5618Addition to lower extremity, test socket, symes
- L5620Addition to lower extremity, test socket, below knee
- L5622Addition to lower extremity, test socket, knee disarticulation
- L5624Addition to lower extremity, test socket, above knee
Common questions about L5646
Is HCPCS L5646 still valid?
- Yes. L5646 is active in the CMS October 2026 HCPCS file.
Does Medicare cover L5646?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.