L5620 — Addition to lower extremity, test socket, below knee
L5620 is a HCPCS Level II code for addition to lower extremity, test socket, below knee. It belongs to the Orthotic and Prosthetic Procedures and Devices section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Medically Unlikely Edits — units per day
The most units of L5620 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 0 — never payable MAI 3 — Date of Service Edit: Clinical · CMS Policy
- outpatient
- 4 units MAI 3 — Date of Service Edit: Clinical · Nature of Equipment
- DME supplier
- 4 units MAI 3 — Date of Service Edit: Clinical · Nature of Equipment
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for L5620
- Long descriptor
- Addition to lower extremity, test socket, below knee
- Short descriptor
- Test socket below knee
- Added
- January 1, 1986
- BETOS
- D1F
- Pricing indicator
- 38 — DMEPOS
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Orthotics, prosthetics, prosthetic devices and vision services. Price subject to floors and ceilings.
Codes adjacent to L5620
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If L5620 is not quite right, the correct code is very often within a few positions of it.
- 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
- L5622Addition to lower extremity, test socket, knee disarticulation
- L5624Addition to lower extremity, test socket, above knee
- L5626Addition to lower extremity, test socket, hip disarticulation
- L5628Addition to lower extremity, test socket, hemipelvectomy
- L5629Addition to lower extremity, below knee, acrylic socket
- L5630Addition to lower extremity, symes type, expandable wall socket
- L5631Addition to lower extremity, above knee or knee disarticulation, acrylic socket
- L5632Addition to lower extremity, symes type, 'ptb' brim design socket
Questions about L5620
What is HCPCS code L5620?
L5620 is a HCPCS Level II code for addition to lower extremity, test socket, below knee. It sits in the Orthotic and Prosthetic Procedures and Devices section.
Does Medicare cover L5620?
The CMS HCPCS file marks L5620 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.