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    v1.0.28
    OpenPayerBilling CodesProsthetic ProceduresHCPCS hcpcs-l5990-lower-extremity-prosthesis-adjustable-heel-height
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    HCPCS L5990: Addition to Lower Extremity Prosthesis, Adjustable Heel Height

    HCPCS Level II code L5990 describes an addition to a lower extremity prosthesis that provides a user-adjustable heel height, typically billed for prosthetic component modifications or add-ons; the service is a prosthetic device accessory used in prosthetics/orthotics services and is most commonly provided in prosthetics clinics, orthotic fitters’ offices, or outpatient specialty centers where lower-limb prostheses are fabricated, adjusted, or modified.

    For related coverage guidance, see recent payer policy updates: Clinical Review Criteria — Lymphedema Therapy and Training (Complete Decongestive Therapy; LVA), Therapy Services — Electric Stimulation for Pain, Swelling and Function in a Clinic Setting, Site of Care: Outpatient Hospital Setting for Physical and Occupational Therapy.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 54-year-old male transtibial prosthesis user presents to a prosthetics clinic for an adjustment to his existing lower extremity prosthesis because he frequently transitions between work shoes and athletic shoes with differing heel heights. He reports recurring socket alignment changes and gait imbalance when switching footwear. The prosthetist evaluates the residual limb, socket fit, and alignment, confirms the prosthetic foot/pylon assembly is compatible with a user adjustable heel-height mechanism, and documents that the device addition is necessary to allow safe functional mobility across variable footwear.

    The clinical workflow includes: a focused history and functional assessment, measurement of the prosthesis, verification of component compatibility, ordering or installing the L5990 addition (user adjustable heel height) to the existing prosthesis, adjusting alignment and heel-height settings, in-clinic gait training and patient education on use and maintenance, and documented follow-up plan. Billing uses the L5990 HCPCS Level II code for the device addition; service site is commonly an outpatient prosthetics/orthotics clinic or specialty orthopedics/prosthetics center.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    97760Orthotic(s) and/or prosthetic(s) management and training, initial encounter (each 15 minutes)Used for patient training and education after installation of the adjustable heel-height addition.
    97761Prosthetic training, subsequent encounter (each 15 minutes)Used for follow-up gait training and functional adjustments after initial fitting of L5990.
    99213Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutesMay be used for the clinical evaluation and documentation prior to ordering or installing the prosthetic addition.
    99070Supplies and materials (used ancillary to other services)May be billed when additional non-covered supplies or minor components are provided during fitting (subject to payer rules).
    97763Orthotic/prosthetic work assessment; device repair or modification, minorUsed when minor on-site modifications or adjustments to the existing prosthesis are performed in conjunction with installation of L5990.

    Related Modifiers

    7 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…
    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…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    324500000XSubstance Abuse Rehabilitation FacilityA facility or distinct part of a facility that provides a 24 hr therapeutically planned living and rehabilitative intervention environment for the tre…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    364S00000XClinical Nurse SpecialistA registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses…
    163WN0800XNeuroscience Registered NurseNursing Service Providers · Registered Nurse
    237600000XAudiologist-Hearing Aid FitterAn audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of …
    363AS0400XSurgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers · Physician Assistant
    374U00000XHome Health AideA person trained to assist public health nurses, home health nurses, and other health professionals in the bedside care of patients in their homes.
    246ZG0701XGraphics Methods Specialist/TechnologistNone

    Related ICD-10-CM Codes

    17 rows

    ICD-10-CM CodeDescription
    G81.90Hemiplegia, unspecified affecting unspecified side
    M80.071AAge-related osteoporosis with current pathological fracture, right ankle and foot, initial encounter for fracture
    M80.072AAge-related osteoporosis with current pathological fracture, left ankle and foot, initial encounter for fracture
    M84.451APathological fracture, right femur, initial encounter for fracture
    M84.452APathological fracture, left femur, initial encounter for fracture
    S78.011AComplete traumatic amputation at right hip joint, initial encounter
    S78.012AComplete traumatic amputation at left hip joint, initial encounter
    T84.51XAInfection and inflammatory reaction due to internal right hip prosthesis, initial encounter
    T84.52XAInfection and inflammatory reaction due to internal left hip prosthesis, initial encounter
    Z89.511Acquired absence of right leg below knee

    Showing 1–10 of 17

    Related Payer Policy Updates

    Specialty: Physical Medicine, Rehab & Therapies1 / 2

    3 rows

    PolicyPayerEffective Date
    Clinical Review Criteria — Lymphedema Therapy and Training (Complete Decongestive Therapy; LVA)Kaiser Permanente2026-09-01
    Therapy Services — Electric Stimulation for Pain, Swelling and Function in a Clinic SettingCigna2026-08-15
    Site of Care: Outpatient Hospital Setting for Physical and Occupational TherapyCigna2026-08-15

    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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