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    v1.0.28
    OpenPayerBilling CodesTemporary CodesHCPCS hcpcs-q4437-revival-agent-per-sq-cm-addon
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    HCPCS Q4437: Revival ac, per square centimeter (add-on)

    HCPCS Level II code Q4437 describes billing for Revival ac, charged per square centimeter as an add-on service reported separately in addition to a primary procedure; the service represents a topical or localized dressing/application measured by surface area, typically used in wound care or dermatologic procedures and delivered in outpatient clinic, wound care center, or ambulatory surgical center settings.

    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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    Clinical & Coding Specifications

    Clinical Context

    A typical patient scenario involves a clinician applying a topical, surface-based antimicrobial or wound-care product measured and billed per square centimeter as an add-on to a primary procedure. For example, a patient with a non-healing diabetic foot ulcer undergoes sharp debridement of necrotic tissue (the primary procedure). After debridement, the clinician applies a topical therapeutic product to the wound bed and documents the surface area treated in square centimeters to support billing of Q4437 as an add-on service. The clinical workflow includes wound assessment and measurement, photographic documentation, performance of the primary procedure (such as debridement or excision), application of the topical product over the quantified area, and contemporaneous documentation of product type, quantity (cm2), and the link to the primary procedure in the procedure note and charge entry. Typical sites of service are outpatient wound clinics, hospital-based outpatient departments, ambulatory surgery centers, and physician offices where minor operative wound care or topical therapies are applied.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    11042Debridement; skin, subcutaneous tissue, muscle and/or fascia (up to 20 sq cm)Often performed as the primary procedure before topical product application billed with Q4437 for the treated surface area.
    11043Debridement; includes fascia and muscle (deeper) (per 20 sq cm)Used for deeper debridement procedures where topical therapies are applied afterward and area-based add-on billing applies.
    97597Removal of devitalized tissue from wound(s), selective debridement, without anesthesia (first 20 sq cm or less)Common outpatient debridement code paired with topical product application billed as Q4437 by surface area.
    97602Negative pressure wound therapy (wound cavity), including topical application managementMay be performed before or after topical product application; documents adjunctive wound care in the same treatment episode.
    12001Simple repair of superficial wounds of scalp, neck, axillae, external genitalia, trunk and/or extremities; 2.5 cm or lessMinor surgical repairs may be the primary procedure, with topical agents applied to the repaired area and billed per cm2 via Q4437.

    Related Modifiers

    5 rows

    ModifierDescriptionWhen to Use
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    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…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…

    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…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    231H00000XAudiologist(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function.…
    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…
    261Q00000XClinic/CenterA facility or distinct part of one used for the diagnosis and treatment of outpatients. "Clinic/Center" is irregularly defined, sometimes being limite…
    174N00000XLactation Consultant (Non-RN)An individual trained to provide breastfeeding assistance services to both mothers and infants. Lactation Consultants are not required to be nurses an…
    347B00000XBusA public or private organization or business licensed to provide bus services.
    283X00000XRehabilitation HospitalA hospital or facility that provides health-related, social and/or vocational services to disabled persons to help them attain their maximum functiona…

    Related ICD-10-CM Codes

    28 rows

    ICD-10-CM CodeDescription
    A49.02Methicillin resistant Staphylococcus aureus infection, unspecified site
    B95.61Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere
    B95.62Methicillin resistant Staphylococcus aureus infection as the cause of diseases classified elsewhere
    E10.621Type 1 diabetes mellitus with foot ulcer
    E11.621Type 2 diabetes mellitus with foot ulcer
    G62.9Polyneuropathy, unspecified
    I70.213Atherosclerosis of native arteries of extremities with intermittent claudication, bilateral legs
    I83.011Varicose veins of right lower extremity with ulcer of thigh
    K57.20Diverticulitis of large intestine with perforation and abscess without bleeding
    L03.039Cellulitis of unspecified toe

    Showing 1–10 of 28

    Related Payer Policy Updates

    Specialty: Infectious Disease1 / 3

    10 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 Diagnosis of Active or Latent TuberculosisOscar Health2026-10-01
    Testing for Vector-Borne InfectionsOscar Health2026-10-01
    Coronavirus Testing in the Outpatient SettingOscar Health2026-10-01
    Human Immunodeficiency Virus (HIV)blue cross blue shield - louisiana2026-09-15

    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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