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    v1.0.28
    OpenPayerBilling CodesOrthotic Procedures and servicesHCPCS hcpcs-l4361-pneumatic-vacuum-prefab-walking-boot
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    HCPCS Level II L4361: Prefabricated Pneumatic/Vacuum Walking Boot

    HCPCS Level II code L4361 describes a prefabricated off-the-shelf walking boot that is pneumatic and/or vacuum-assisted, with or without joints and interface materials; this durable medical equipment item is used for ambulatory lower-extremity immobilization and support and is commonly supplied in outpatient clinics, durable medical equipment suppliers, emergency departments, and ambulatory surgery centers for temporary weight-bearing protection and stabilization of foot and ankle injuries.

    For related coverage guidance, see recent payer policy updates: Interferential Stimulation Devices (for home use), Prior Authorization for Durable Medical Equipment (DME), Breast Pumps.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 56-year-old patient presents to an orthopedic clinic after a lateral ankle sprain sustained while hiking. The clinician performs an evaluation, documents tenderness, swelling, and instability, and obtains weight-bearing radiographs to rule out fracture. The diagnosis is an acute lateral ankle sprain with soft-tissue swelling. The provider determines that immobilization with a prefabricated pneumatic walking boot is appropriate to protect the ankle, limit motion, and permit early ambulation. A durable medical equipment (DME) supplier dispenses a prefabricated, off-the-shelf pneumatic walking boot L4361 in the clinic or outpatient DME setting. The supplier documents patient measurements, device model, fitting, and patient education on application, pneumatic adjustment (if applicable), skin checks, and follow-up instructions. Typical sites of service include outpatient orthopedic clinic, urgent care clinic, hospital outpatient department, or DME supplier location. The device is used for ambulatory protection after sprain, uncomplicated fracture immobilization when ordered as an alternative to casting, postoperative protection after foot/ankle procedures, or for chronic instability requiring bracing.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99455Work-related or medical disability evaluation services, by physician or other qualified healthcare professional; initial evaluationMay be performed when documenting functional limitations that support DME like a pneumatic walking boot
    99213Office or other outpatient visit for the evaluation and management of an established patient, moderate complexityTypical visit during which L4361 is prescribed and documentation of medical necessity is completed
    73630Radiologic examination, ankle; 2 or 3 viewsOften obtained prior to fitting a walking boot to exclude displaced fracture
    11042Debridement; skin, subcutaneous tissue and muscle, first stage (list separately in addition to code for primary procedure)May be performed prior to fitting in cases with wound care requiring immobilization (used when clinically applicable)
    99070Supplies and materials (except spectacles), non-covered items billed separately by the physicianUsed when additional non-covered interface materials or special liners for the boot are provided by the clinic

    Related Modifiers

    5 rows

    ModifierDescriptionWhen to Use
    97Modifier 97 is an informational modifier used with therapy CPT codes to indicate services are rehabilitative — intended to restore skills or function lost due to illness, injury, or disability. It is…- Use modifier 97 when reporting therapy services that are rehabilitative in nature — i.e., provided to restore skills or function lost or impaired because of illness, injury, or disability (for…
    33Modifier 33 was created by the American Medical Association in response to the Affordable Care Act to identify services provided for preventive intent. It is appended to CPT/HCPCS codes that could be…- Use modifier -33 when a CPT/HCPCS service that can be billed as either preventive or diagnostic/treatment is provided with preventive intent and aligns with USPSTF A or B recommendations or other…
    90Modifier ‑90 (Reference/Outside Laboratory) indicates that a laboratory test was performed by an entity other than the treating or reporting provider. The American Medical Association defines…- Use CPT modifier -90 when a laboratory test is performed by an outside/reference laboratory (an entity other than the treating or reporting physician or qualified professional) and the claim needs…
    2PModifier -2P is a Category II performance‑measure exclusion appended to a CPT Category II (quality) code when the provider did not perform the measured action because of patient‑related reasons (for…- Use modifier 2P only with CPT Category II (performance‑measure) codes when a patient‑specific reason prevented performance of the measured action (for example, patient refusal, economic or social…
    32Modifier 32 (Mandated Services) indicates that a CPT-coded service was required by a third party—such as an insurer, school, state agency, or court. The AMA defines it as denoting services mandated…- Use Modifier 32 when a service or procedure was explicitly mandated by a third party (for example an insurer requiring a second opinion, a school requiring a sports physical, a state agency or…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    2080P0207XPediatric Hematology & Oncology PhysicianA pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous disea…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    3336C0002XClinic PharmacyA pharmacy in a clinic, emergency room or hospital (outpatient) that dispenses medications to patients for self-administration under the supervision o…
    261QP2300XPrimary Care Clinic/CenterAmbulatory Health Care Facilities · Clinic/Center
    207RP1001XPulmonary Disease PhysicianAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
    2278S1500XSNF/Subacute Care Certified Respiratory TherapistCare of residents in a long-term care environment. Respiratory modalities delivered include those similar in the general care and critical care areas…
    246ZN0300XNephrology Specialist/TechnologistTechnologists, Technicians & Other Technical Service Providers · Specialist/Technologist, Other
    2083T0002XMedical Toxicology (Preventive Medicine) PhysicianMedical toxicologists are physicians who specialize in the prevention, evaluation, treatment and monitoring of injury and illness from exposures to dr…

    Related ICD-10-CM Codes

    24 rows

    ICD-10-CM CodeDescription
    E11.621Type 2 diabetes mellitus with foot ulcer
    G57.61Lesion of plantar nerve, right lower limb
    M17.11Unilateral primary osteoarthritis, right knee
    M17.12Unilateral primary osteoarthritis, left knee
    M20.11Hallux valgus (acquired), right foot
    M24.271Disorder of ligament, right ankle
    M24.272Disorder of ligament, left ankle
    M25.471Effusion, right ankle
    M25.472Effusion, left ankle
    M25.571Pain in right ankle and joints of right foot

    Showing 1–10 of 24

    Related Payer Policy Updates

    Specialty: Durable Medical Equipment (DME)1 / 3

    10 rows

    PolicyPayerEffective Date
    Interferential Stimulation Devices (for home use)Moda Health2026-10-01
    Prior Authorization for Durable Medical Equipment (DME)Blue Cross Blue Shield - Rhode Island2026-10-01
    Breast PumpsModa Health2026-09-01
    Personal Emergency Response SystemsCareSource Georgia2026-09-01
    Continuous Passive Motion (CPM) DevicesCigna2026-08-15
    Push-Rim Activated Power-Assist Device (E0986) — Manual Wheelchair Accessorymoda_health_plan_inc2026-08-13
    Beds and Mattresses (for Ohio Only)Colorado Rocky Mountain Health Plans2026-08-01
    Beds and Mattresses (for Kentucky Only)UnitedHealthcare2026-08-01
    Pneumatic Compression Devices (for Nebraska Only)UnitedHealthcare2026-08-01
    Indications for Coverage — Hospital beds, support surfaces, and safety enclosure beds (DME)Colorado Rocky Mountain Health Plans2026-08-01

    Related Codes

    HCPCS-L0112-CRANIAL-CERVICAL-ORTHOSIS-CONGENITAL-TORTICOLLIS-CUSTOM

    HCPCS L0112: Cranial Cervical Orthosis, Congenital Torticollis Type

    HCPCS-L0113-CRANIAL-CERVICAL-ORTHOSIS-TORTICOLLIS

    HCPCS Level II L0113: Prefabricated Cranial Cervical Orthosis for Torticollis

    HCPCS-L0130-CERVICAL-FLEXIBLE-THERMOPLASTIC-COLLAR-MOLDED-TO-PATIENT

    HCPCS Level II L0130: Cervical Flexible Thermoplastic Collar, Molded to Patient

    HCPCS-L0140-CERVICAL-SEMI-RIGID-ADJUSTABLE-PLASTIC-COLLAR

    HCPCS Level II L0140: Cervical Semi-Rigid Adjustable Plastic Collar

    HCPCS-L0150-CERVICAL-SEMI-RIGID-ADJUSTABLE-CHIN-CUP

    HCPCS Level II L0150: Cervical Semi-Rigid Adjustable Chin Cup

    HCPCS-L0160-CERVICAL-SEMI-RIGID-OCCIPITAL-MANDIBULAR-SUPPORT

    HCPCS Level II L0160: Cervical Semi-Rigid Occipital/Mandibular Support

    HCPCS-L0170-CERVICAL-COLLAR-MOLDED-TO-PATIENT-MODEL

    HCPCS Level II L0170: Cervical Collar, Custom-Molded

    HCPCS-L0172-CERVICAL-COLLAR-SEMI-RIGID-THERMOPLASTIC-FOAM

    HCPCS L0172: Cervical Collar, Semi-Rigid Prefabricated

    HCPCS-L0174-CERVICAL-COLLAR-SEMI-RIGID-THORACIC-EXTENSION

    HCPCS L0174: Cervical Collar, Semi-Rigid Thermoplastic with Thoracic Extension

    HCPCS-L0180-CERVICAL-MULTIPLE-POST-COLLAR-OCCIPITAL-MANDIBULAR-ADJUSTABLE

    HCPCS Level II L0180: Cervical Orthosis with Occipital/Mandibular Supports

    Showing 1–10 of 466

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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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