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    v1.0.31
    OpenPayerBilling CodesProsthetic ProceduresHCPCS hcpcs-l5966-hip-disarticulation-flexible-protective-covering
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    HCPCS Level II L5966: Endoskeletal Hip Disarticulation Flexible Outer Covering

    HCPCS Level II code L5966 describes an addition to an endoskeletal prosthetic system for hip disarticulation that provides a flexible protective outer surface covering; this code applies to prosthetic component additions and is typically associated with prosthetics/orthotics services provided in an outpatient prosthetics clinic or durable medical equipment (DME) supplier setting for patients requiring a hip disarticulation socket covering.

    For related coverage guidance, see recent payer policy updates: Speech Therapy for Autism Disorders - Medical Policy, Physical Performance Test or Measurement, Sensory Integration Therapy and Auditory Integration Training.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old male with a long-standing history of peripheral vascular disease and chronic osteomyelitis presents after multiple failed limb salvage attempts and recurrent infection despite revascularization and antibiotics. The patient undergoes a hip disarticulation amputation for definitive source control and prosthetic candidacy. Postoperatively the prosthetist fabricates and fits an endoskeletal prosthetic system designed for hip disarticulation level, and adds a flexible protective outer surface covering system to the endoskeletal frame to provide soft-tissue protection and cosmesis. Typical clinical workflow: pre-prosthetic assessment by the surgical and prosthetic teams, measured casting or digital scanning of the residual pelvis/hemipelvis, fabrication of an endoskeletal hip-disarticulation socket and frame, fitting and alignment session, addition of the flexible protective outer surface covering (L5966) applied to the endoskeletal assembly, gait training with physical therapy, and follow-up visits for adjustments and skin checks. Typical site of service: outpatient prosthetics/orthotics clinic or hospital-based prosthetics lab with initial fitting often in hospital inpatient setting followed by outpatient follow-up.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    97760Orthotic(s) management and training, upper extremity, lower extremity, and/or trunk; initial orthotic fit and trainingUsed for initial training and education when fitting a hip-disarticulation prosthetic system and its protective covering.
    97763Orthotic/prosthetic management and training, upper and lower extremity(s), including gait training (pro-rated time)Applies to gait training sessions after fitting the hip-disarticulation prosthesis with the flexible covering.
    99070Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visit or other services rendered (list separately in addition to code for office visit)Used to bill for non-standard disposable supplies or materials associated with prosthetic fitting if applicable.
    99080Special reports such as medical records or document preparation, not otherwise classifiedMay be used for documentation requests related to the prosthetic prescription or justification.
    64570Percutaneous implantation of neurostimulator electrode array, spine, sacral or peripheral nerve, single arrayNot typically performed but included if neuromodulation procedures are part of complex pain management pre- or post-amputation (use only when clinically applicable).

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208M00000X
    208D00000X
    246ZG1000X
    376K00000X
    2251E1300X
    3336I0012X
    163WI0500X
    363LX0001X

    Related ICD-10-CM Codes

    18 rows

    ICD-10-CM CodeDescription
    G82.20Paraplegia, unspecified
    G82.21Paraplegia, complete
    M84.361AStress fracture, right tibia, initial encounter for fracture
    M84.362AStress fracture, left tibia, initial encounter for fracture
    M84.363AStress fracture, right fibula, initial encounter for fracture
    M84.369AStress fracture, unspecified tibia and fibula, initial encounter for fracture
    M84.461APathological fracture, right tibia, initial encounter for fracture
    M84.462APathological fracture, left tibia, initial encounter for fracture
    M84.463APathological fracture, right fibula, initial encounter for fracture
    M84.469APathological fracture, unspecified tibia and fibula, initial encounter for fracture

    Showing 1–10 of 18

    Related Payer Policy Updates

    Specialty: Physical Medicine, Rehab & Therapies1 / 2

    10 rows

    PolicyPayerEffective Date
    Speech Therapy for Autism Disorders - Medical PolicyHealth-New-England2026-12-01
    Physical Performance Test or MeasurementCigna2026-11-15
    Sensory Integration Therapy and Auditory Integration TrainingColorado Rocky Mountain Health Plans2026-11-01
    Skilled Nursing and Skilled Rehabilitation Services (Outpatient)Anthem2026-10-01
    Habilitation and Rehabilitation Therapy (Occupational, Physical, and Speech) (for New Mexico Only)UnitedHealthcare2026-10-01
    Physical Therapy/Medicine Corporate Medical Policybcbsvermont2026-10-01
    Cognitive Rehabilitation Corporate Medical Policybcbsvermont2026-10-01
    Speech Language Pathology/Therapy Services Corporate Medical Policybcbsvermont2026-10-01
    Occupational Therapy Corporate Medical Policybcbsvermont2026-10-01
    Biomagnetic TherapyConnectiCare2026-09-11

    Related Codes

    HCPCS-L5000-PARTIAL-FOOT-SHOE-INSERT-LONGITUDINAL-ARCH-TOE-FILLER

    HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

    HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

    HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

    HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

    HCPCS L5020: Partial Foot Molded Socket with Toe Filler

    HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

    HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

    HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

    HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

    HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

    HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

    HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

    HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

    HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

    HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

    HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

    HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

    HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

    HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

    Showing 1–10 of 472

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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