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    v1.0.28
    OpenPayerBilling CodesProsthetic ProceduresHCPCS hcpcs-l8480-prosthetic-sock-above-knee-fitting
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    HCPCS L8480: Prosthetic Sock, Single Ply, Above Knee, Fitting

    HCPCS Level II code L8480 describes a single-ply prosthetic sock used for fitting an above-knee (transfemoral) prosthesis; this item represents a clinical supply intended for use during prosthetic fitting and adjustment and is typically provided in an outpatient prosthetics clinic, durable medical equipment (DME) supplier setting, or rehabilitation facility when preparing or modifying an above-knee prosthetic socket for proper fit and comfort.

    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 58-year-old male with a right transfemoral amputation presents to a prosthetics clinic for routine fitting and maintenance of his existing above-knee socket. The patient reports increased distal pressure and minor skin irritation after recent weight change. A certified prosthetist evaluates the socket fit, measures limb volume, and selects a single-ply prosthetic sock sized for the residual limb to improve comfort and interface pressure distribution. The prosthetist documents limb measurements, sock ply and quantity, and performs the fitting during an outpatient clinic visit. The single-ply sock is provided and adjusted until appropriate cushioning and suspension are achieved. Billing uses L8480 for the prosthetic sock, single ply, fitting, above knee, each, appended with the appropriate modifier reflecting laterality and payer requirements. Typical site of service is an outpatient prosthetics and orthotics clinic within a hospital outpatient department or independent prosthetics provider office. Follow-up may include skin checks and socket adjustments in subsequent visits.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    97760Orthotic(s) management and training: initial encounter, each 15 minutesUsed for patient education and training on donning/doffing and care of the prosthetic sock and interface during an initial fitting visit
    97763Orthotic(s) management and training: subsequent encounter, each 15 minutesUsed for follow-up training sessions after initial fitting when additional instruction is provided
    97110Therapeutic exercises to develop strength and endurance, each 15 minutesPerformed by physical therapy to improve gait and residual limb strength related to prosthesis use after sock fitting
    99213Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutesCommon E/M code for the clinic visit associated with prosthetic sock evaluation and fitting when a clinician documents medical decision-making and exam
    L4631Insert, removable, molded to patient model, flexible, per limb, for above-knee prosthesisRelated DME/prosthetic component that may be measured or adjusted in the same prosthetic fitting workflow

    Related Modifiers

    5 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    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…
    93Modifier 93 denotes that a billed service was delivered synchronously via audio-only telecommunications (real-time telephone or other audio-only system). The AMA added modifier 93 in CPT Appendix A…- When to use: Apply modifier -93 when a synchronous, real-time, two-way patient–provider encounter is conducted entirely via audio-only (telephone or other real-time interactive audio-only…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    208M00000XHospitalist PhysicianHospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient ca…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    2279P1004XPulmonary Diagnostics Registered Respiratory TherapistIncluded in the area of pulmonary diagnostics are the following; collection and analysis of physiological specimens, interpretation of physiological d…
    156FX1800XOpticianOpticians help fit eyeglasses and contact lenses, following prescriptions from Ophthalmologists and Optometrists. They also help customers decide whi…
    2251G0304XGeriatric Physical TherapistA licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Geriatric Physical Therapy, who has d…
    282NC2000XChildren's HospitalHospitals · General Acute Care Hospital
    2278C0205XCritical Care Certified Respiratory TherapistRespiratory emergencies are commonplace in the treatment of critical care patients. Included in the assessment measurements conducted by the respirat…

    Related ICD-10-CM Codes

    23 rows

    ICD-10-CM CodeDescription
    E10.621Type 1 diabetes mellitus with foot ulcer
    E11.51Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene
    E11.52Type 2 diabetes mellitus with diabetic peripheral angiopathy with gangrene
    E11.621Type 2 diabetes mellitus with foot ulcer
    G54.6Phantom limb syndrome with pain
    G62.9Polyneuropathy, unspecified
    I70.231Atherosclerosis of native arteries of right leg with ulceration of thigh
    I70.232Atherosclerosis of native arteries of right leg with ulceration of calf
    I70.233Atherosclerosis of native arteries of right leg with ulceration of ankle
    L89.313Pressure ulcer of right buttock, stage 3

    Showing 1–10 of 23

    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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