L2999 — Lower extremity orthoses, not otherwise specified
L2999 is a HCPCS Level II code for lower extremity orthoses, not otherwise specified. 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 L2999 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
- 2 units MAI 3 — Date of Service Edit: Clinical · Clinical: Data
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 L2999
- Long descriptor
- Lower extremity orthoses, not otherwise specified
- Short descriptor
- Lower extremity orthosis nos
- Added
- January 1, 1982
- BETOS
- D1F
- Pricing indicator
- 46 — 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.
Carrier priced — not otherwise classified, individual determination, carrier discretion, or gap-filled amounts.
Codes adjacent to L2999
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If L2999 is not quite right, the correct code is very often within a few positions of it.
- L2795Addition to lower extremity orthosis, knee control, full kneecap
- L2800Addition to lower extremity orthosis, knee control, knee cap, medial or lateral pull, for use with custom fabricated orthosis only
- L2810Addition to lower extremity orthosis, knee control, condylar pad
- L2820Addition to lower extremity orthosis, soft interface for molded plastic, below knee section
- L2830Addition to lower extremity orthosis, soft interface for molded plastic, above knee section
- L2840Addition to lower extremity orthosis, tibial length sock, fracture or equal, each
- L2850Addition to lower extremity orthosis, femoral length sock, fracture or equal, each
- L2861Addition to lower extremity joint, knee or ankle, concentric adjustable torsion style mechanism for custom fabricated orthotics only, each
- L3000Foot, insert, removable, molded to patient model, 'ucb' type, berkeley shell, each
- L3001Foot, insert, removable, molded to patient model, spenco, each
- L3002Foot, insert, removable, molded to patient model, plastazote or equal, each
- L3003Foot, insert, removable, molded to patient model, silicone gel, each
- L3010Foot, insert, removable, molded to patient model, longitudinal arch support, each
- L3020Foot, insert, removable, molded to patient model, longitudinal/ metatarsal support, each
- L3030Foot, insert, removable, formed to patient foot, each
- L3031Foot, insert/plate, removable, addition to lower extremity orthosis, high strength, lightweight material, all hybrid lamination/prepreg composite, each
Questions about L2999
What is HCPCS code L2999?
L2999 is a HCPCS Level II code for lower extremity orthoses, not otherwise specified. It sits in the Orthotic and Prosthetic Procedures and Devices section.
Does Medicare cover L2999?
The CMS HCPCS file marks L2999 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.