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    v1.0.28
    OpenPayerBilling CodesTemporary CodesHCPCS hcpcs-q4234-xcellerate-per-square-centimeter
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    HCPCS Level II Q4234: Xcellerate, per Square Centimeter (Add-on)

    Medicare pays $133 on average nationally for this procedure.

    HCPCS Level II code Q4234 describes billing for Xcellerate measured per square centimeter as an add-on procedure billed separately in addition to a primary procedure; the service represents an area-based treatment or product applied during a procedure and is typically coded in operative or procedure settings such as ambulatory surgical centers or hospital outpatient departments where adjunctive topical or localized treatments are provided.

    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

    A typical patient is an adult with a chronic, non-healing wound (for example a diabetic foot ulcer or venous stasis ulcer) referred to a wound care clinic or outpatient surgical practice for advanced biologic topical therapy. The clinician measures the wound area in square centimeters, debrides devitalized tissue when appropriate, and applies Q4234 (Xcellerate) as an adjunctive topical biologic per square centimeter over the wound bed following irrigation and hemostasis. The service is billed in addition to the primary wound procedure (such as debridement) and documented with wound dimensions, preparatory steps (cleansing, debridement, hemostasis), product lot numbers, quantity applied (cm2), and patient tolerance. Typical sites of service include outpatient wound care centers, ambulatory surgical centers, and hospital outpatient departments. The patient encounter includes baseline wound assessment, informed consent for use of the biologic product, application technique, and follow-up instructions with scheduled reassessment for healing progress.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    11042Debridement, subcutaneous tissue, first 20 sq cm or lessOften performed prior to application of Q4234 to prepare the wound bed
    97602Removal of devitalized tissue from wound(s), selective debridement, without anesthesia (eg, wet-to-dry dressings), per sessionApplicable for clinic-based debridement sessions preceding product application
    97018Paraffin bath (localized)Supportive wound care modality sometimes used in conjunction with topical biologics during dressing changes
    13131Secondary closure of surgical wound, simple; 1.1 cm to 2.5 cmProcedures related to wound closure that may follow biologic product application
    15271Tissue grafting, skin graft; first 20 sq cm or less, split-thicknessAdvanced closure options that may be used after or in combination with adjunctive biologic therapy
    99406Smoking and tobacco use cessation counseling, intermediate, greater than 3 minutes up to 10 minutesCommon counseling service during wound care visits to address modifiable factors affecting healing

    Related Modifiers

    9 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…
    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…
    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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    208600000XSurgery PhysicianA general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of s…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    163W00000XRegistered Nurse(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
    332900000XNon-Pharmacy Dispensing SiteA site other than a pharmacy that dispenses medicinal preparations under the supervision of a physician to patients for self-administration. (e.g. phy…
    126800000XDental AssistantAn individual who may or may not have completed an accredited dental assisting education program and who aids the dentist in providing patient care se…
    2471V0105XVascular Sonography Radiologic TechnologistA radiologic technologist who specializes in vascular sonography and is trained in the use of ultrasound equipment to image veins and arteries, which …
    227800000XCertified Respiratory TherapistA Certified Respiratory Therapist (CRT) is a an entry level therapist who has passed a standardized written examination administered by the National B…

    Related ICD-10-CM Codes

    30 rows

    ICD-10-CM CodeDescription
    E11.621Type 2 diabetes mellitus with foot ulcer
    I83.10Varicose veins of unspecified lower extremity with inflammation
    I83.811Varicose veins of right lower extremity with pain
    L89.011Pressure ulcer of right elbow, stage 1
    L89.012Pressure ulcer of right elbow, stage 2
    L89.013Pressure ulcer of right elbow, stage 3
    L89.014Pressure ulcer of right elbow, stage 4
    L89.221Pressure ulcer of left hip, stage 1
    L89.222Pressure ulcer of left hip, stage 2
    L89.223Pressure ulcer of left hip, stage 3

    Showing 1–10 of 30

    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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