L1831 HCPCS Level II code: Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment
L1831 is the HCPCS code for “Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
L1831Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment
Short description: Knee orth pos locking joint
HCPCS · United States
Medicare details
The indicators CMS publishes with L1831 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- DMEPOS fee schedule – Orthotics, prosthetics, prosthetic devices & vision services (price subject to floors and ceilings)
- Type of service
- Lump sum purchase of DME, prosthetics, orthotics
- BETOS category
- Prosthetic/Orthotic devices
- Added
- Jan 1, 2004
Where L1831 sits
- 1L codesOrthotics and prosthetics
- 2Active code L1831Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code L1831 mean?
L1831 is the HCPCS code for “Knee orthosis, locking knee joint(s), positional orthosis, prefabricated, includes fitting and adjustment” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover L1831?
CMS lists L1831’s Medicare coverage as “Carrier judgment” and its pricing as “DMEPOS fee schedule – Orthotics, prosthetics, prosthetic devices & vision services (price subject to floors and ceilings)”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside L1831
All L codesL1755Legg perthes orthosis, (patten bottom type), custom fabricatedL1810Knee orthosis, elastic with joints, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with…L1812Knee orthosis, elastic with joints, prefabricated, off-the-shelfL1820Knee orthosis, elastic with condylar pads and joints, with or without patellar control, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized…L1821Knee orthosis, elastic with condylar pads and joints, with or without patellar control, prefabricated, off the shelfL1830Knee orthosis, immobilizer, canvas longitudinal, prefabricated, off-the-shelfL1832Knee orthosis, adjustable knee joints (unicentric or polycentric), positional orthosis, rigid support, prefabricated item that has been trimmed, bent, molded, assembled, or…L1833Knee orthosis, adjustable knee joints (unicentric or polycentric), positional orthosis, rigid support, prefabricated, off-the shelfL1834Knee orthosis, without knee joint, rigid, custom fabricatedL1836Knee orthosis, rigid, without joint(s), includes soft interface material, prefabricated, off-the-shelfL1840Knee orthosis, derotation, medial-lateral, anterior cruciate ligament, custom fabricatedL1843Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without…