L5780 — Addition, exoskeletal knee-shin system, single axis, pneumatic/hydra pneumatic swing phase control
L5780 is a HCPCS Level II code for addition, exoskeletal knee-shin system, single axis, pneumatic/hydra pneumatic swing phase control. 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 L5780 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 2 — Date of Service Edit: Policy · Anatomic Consideration
- DME supplier
- 2 units MAI 2 — Date of Service Edit: Policy · Anatomic Consideration
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 L5780
- Long descriptor
- Addition, exoskeletal knee-shin system, single axis, pneumatic/hydra pneumatic swing phase control
- Short descriptor
- Knee-shin pneum/hydra pneum
- 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 L5780
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If L5780 is not quite right, the correct code is very often within a few positions of it.
- L5712Addition, exoskeletal knee-shin system, single axis, friction swing and stance phase control (safety knee)
- L5714Addition, exoskeletal knee-shin system, single axis, variable friction swing phase control
- L5716Addition, exoskeletal knee-shin system, polycentric, mechanical stance phase lock
- L5718Addition, exoskeletal knee-shin system, polycentric, friction swing and stance phase control
- L5722Addition, exoskeletal knee-shin system, single axis, pneumatic swing, friction stance phase control
- L5724Addition, exoskeletal knee-shin system, single axis, fluid swing phase control
- L5726Addition, exoskeletal knee-shin system, single axis, external joints fluid swing phase control
- L5728Addition, exoskeletal knee-shin system, single axis, fluid swing and stance phase control
- L5781Addition to lower limb prosthesis, vacuum pump, residual limb volume management and moisture evacuation system
- L5782Addition to lower limb prosthesis, vacuum pump, residual limb volume management and moisture evacuation system, heavy duty
- L5783Addition to lower extremity, user adjustable, mechanical, residual limb volume management system (with or without lamination kit)
- L5785Addition, exoskeletal system, below knee, ultra-light material (titanium, carbon fiber or equal)
- L5790Addition, exoskeletal system, above knee, ultra-light material (titanium, carbon fiber or equal)
- L5795Addition, exoskeletal system, hip disarticulation, ultra-light material (titanium, carbon fiber or equal)
- L5810Addition, endoskeletal knee-shin system, single axis, manual lock
- L5811Addition, endoskeletal knee-shin system, single axis, manual lock, ultra-light material
Questions about L5780
What is HCPCS code L5780?
L5780 is a HCPCS Level II code for addition, exoskeletal knee-shin system, single axis, pneumatic/hydra pneumatic swing phase control. It sits in the Orthotic and Prosthetic Procedures and Devices section.
Does Medicare cover L5780?
The CMS HCPCS file marks L5780 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.