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    v1.0.28
    OpenPayerBilling CodesTemporary CodesHCPCS hcpcs-q4030-long-leg-fiberglass-cast-adult
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    HCPCS Level II Q4030: Cast Supplies, Long Leg Fiberglass, Adult

    HCPCS Level II code Q4030 describes cast supplies for a long leg cast intended for adults (11 years and older) using fiberglass materials; the service is a durable medical supply typically used in orthopedic immobilization and is supplied in settings such as outpatient clinics, emergency departments, ambulatory surgical centers, or inpatient hospital units when a long leg cast is applied for fracture management or postoperative immobilization.

    For related coverage guidance, see recent payer policy updates: B-Hemolytic Streptococcus Testing, Human Immunodeficiency Virus (HIV) — Coverage Criteria for Testing and Resistance Assays, Hepatitis Testing (A, B, C, D) Coverage Criteria.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    An adult patient (age 18+) presents to the orthopedic clinic or emergency department with an acute lower-extremity injury such as a distal femur fracture, proximal tibia fracture, tibial shaft fracture, or complex soft-tissue injury requiring immobilization. After clinical evaluation and radiographic imaging confirm the need for a long leg immobilization, an orthopedic clinician or cast technician applies a Q4030 long leg fiberglass cast supply set (adult). The workflow commonly includes wound assessment or closed reduction as indicated, selection of appropriate padding and fiberglass material, molding to maintain alignment, and patient education on cast care and weight-bearing status. Follow-up appointments are scheduled for wound checks, potential cast windowing for compartment concerns, or cast removal and conversion to functional bracing once healing permits.

    Typical site of service: ambulatory orthopedic clinic, emergency department, urgent care, or outpatient surgical center.

    Typical patient scenario: a 45-year-old male presents after a fall with a displaced tibial plateau fracture confirmed by X-ray and CT. The orthopedic team performs closed reduction in the ED, applies analgesia, and places a long leg fiberglass cast using Q4030 supplies to immobilize the knee and tibia. The patient is instructed on non–weight-bearing precautions and returns in 1–2 weeks for re-evaluation and radiographs.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    29125Application of long arm cast (shoulder to hand)Data not available in the input.
    29405Application of short leg cast (below knee to foot)Often performed for more distal lower-extremity fractures when long leg immobilization is not required
    29700Strapping, nonoperative management of ankle/footAdjunct immobilization used before definitive casting or as alternative
    20690Application of external fixation device (separate procedure)May precede or follow casting for unstable fractures requiring stabilization
    28800Open treatment of metatarsal fracture, with or without internal fixationSurgical procedures after which a long leg cast may be applied during postoperative immobilization

    Related Modifiers

    7 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    174400000XSpecialistAn individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond…
    390200000XStudent in an Organized Health Care Education/Training ProgramAn individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensur…
    333600000XPharmacyA facility used by pharmacists for the compounding and dispensing of medicinal preparations and other associated professional and administrative servi…
    364SF0001XFamily Health Clinical Nurse SpecialistPhysician Assistants & Advanced Practice Nursing Providers · Clinical Nurse Specialist
    287300000XDeactivated - Christian Science SanitoriumInactive, use 282J00000X
    207LH0002XHospice and Palliative Medicine (Anesthesiology) PhysicianAn anesthesiologist with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This …
    347E00000XTransportation BrokerAn organization that provides transportation for individuals who need access to medical care or services and have no other means of transportation. Tr…

    Related ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    G82.20Paraplegia, unspecified
    M25.561Pain in right knee
    M25.562Pain in left knee
    M25.571Pain in right ankle and joints of right foot
    M25.572Pain in left ankle and joints of left foot
    M79.661Pain in right lower leg
    M84.359AStress fracture, hip, unspecified, initial encounter for fracture
    M84.361AStress fracture, right tibia, initial encounter for fracture
    M84.451APathological fracture, right femur, initial encounter for fracture
    S72.001AFracture of unspecified part of neck of right femur, initial encounter for closed fracture

    Showing 1–10 of 27

    Related Payer Policy Updates

    Specialty: Infectious Disease1 / 3

    9 rows

    PolicyPayerEffective Date
    B-Hemolytic Streptococcus TestingOscar Health2026-10-01
    Human Immunodeficiency Virus (HIV) — Coverage Criteria for Testing and Resistance AssaysOscar Health2026-10-01
    Hepatitis Testing (A, B, C, D) Coverage CriteriaOscar Health2026-10-01
    Lyme Disease Testing Coverage CriteriaOscar Health2026-10-01
    Pathogen Panel TestingOscar Health2026-10-01
    Diagnostic Testing of Common Sexually Transmitted InfectionsOscar Health2026-10-01
    Testing for Vector-Borne InfectionsOscar Health2026-10-01
    Coronavirus Testing in the Outpatient SettingOscar Health2026-10-01
    Testing for Diagnosis of Active or Latent TuberculosisOscar Health2026-10-01

    Related Codes

    HCPCS-LEVEL-II-Q4139-INJECTABLE-AMNIOMATRIX-BIODMATRIX-1-CC

    HCPCS Q4139: Amniomatrix or Biodmatrix, Injectable, 1 cc

    HCPCS-LEVEL-II-Q4256-AREA-BASED-PROCEDURAL-ADD-ON-PER-SQ-CM

    HCPCS Q4256: MLG-complete Skin Graft Material, Per Sq Cm

    HCPCS-LEVEL-II-Q5132-ADALIMUMAB-AFZB-ABRILADA-10MG-INJECTION

    HCPCS Level II Q5132: Injection, adalimumab-afzb (Abrilada), 10 mg

    HCPCS-Q0035-CARDIOKYMOGRAPHY-CARDIAC-MOTION-RECORDING

    HCPCS Level II Q0035: Cardiokymography

    HCPCS-Q0081-INFUSION-THERAPY-NON-CHEMOTHERAPEUTIC-PER-VISIT

    HCPCS Level II Q0081: Infusion Therapy, Non‑Chemotherapeutic, Per Visit

    HCPCS-Q0083-CHEMOTHERAPY-NON-INFUSION-ADMINISTRATION

    HCPCS Q0083: Chemotherapy Administration, Non-Infusion Methods

    HCPCS-Q0084-CHEMOTHERAPY-INFUSION-ADMINISTRATION-PER-VISIT

    HCPCS Q0084: Chemotherapy Infusion Administration, Per Visit

    HCPCS-Q0085-CHEMOTHERAPY-INFUSION-PLUS-OTHER-TECHNIQUES-PER-VISIT

    HCPCS Q0085: Chemotherapy Infusion Plus Other Technique(s), Per Visit

    HCPCS-Q0091-PAP-SMEAR-SPECIMEN-COLLECTION-TRANSPORT

    HCPCS Q0091: Screening Papanicolaou Smear Collection and Transport

    HCPCS-Q0092-PORTABLE-XRAY-EQUIPMENT-SETUP

    HCPCS Q0092: Set-up Portable X-ray Equipment

    Showing 1–10 of 629

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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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