L1843 Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise

Short descriptor: Ko single upright pre cst

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L1843 is the HCPCS Level II code for Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise (2026). It belongs to Section L — Orthotic & Prosthetic Procedures. Under Medicare, its coverage status is: Carrier judgment. Part B pricing methodology: Orthotics, prosthetics & vision services.

Classification & CMS Attributes

Medicare Coverage
Carrier judgment (code C)
Part B Pricing
Orthotics, prosthetics & vision services (indicator 38)
Type of Service
Lump-sum purchase of DME, prosthetics, orthotics
Effective Date
2014-01-01
2026 Maintenance
No change this year

References

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Reference L1843 with the canonical source and edition:

L1843 — Knee orthosis, single upright, thigh and calf, with adjustable flexion and extension joint (unicentric or polycentric), medial-lateral and rotation control, with or without varus/valgus adjustment, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise. ICD-10 Coding Pro (HCPCS Level II 2026). https://icd10codingpro.com/hcpcs-codes/L1843

Canonical URL: https://icd10codingpro.com/hcpcs-codes/L1843

Related Codes in Section L

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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2026-01-01

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