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    v1.0.28
    OpenPayerBilling CodesTemporary CodesHCPCS hcpcs-q4368-amchothick-per-square-centimeter-add-on
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    HCPCS Q4368: Amchothick, per square centimeter (add-on)

    Medicare pays $133 on average nationally for this procedure.

    HCPCS Level II code Q4368 describes billing for Amchothick per square centimeter as an add-on surgical/material service billed in addition to a primary procedure; the service type is an add-on surgical/material supply and the typical site of service is an ambulatory surgical center or hospital outpatient setting where the primary procedure is performed.

    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 patient with a localized dermatologic lesion (for example, a thickened scar, hypertrophic tissue, or localized soft-tissue mass) undergoes a procedure during which an amchothick product is applied or implanted per square centimeter as an adjunct to the primary surgical or dermatologic procedure. Typical workflow: preoperative evaluation documents indication and lesion dimensions; consent includes discussion of add-on material used; the primary procedure (for example, excision, debridement, or reconstructive procedure) is performed; the clinician measures the area treated in square centimeters and documents quantity of Q4368 units used; intraoperative and postoperative notes document placement, hemostasis, and any additional maneuvers. Typical site of service is an ambulatory surgical center or hospital outpatient department; the service is billed as an add-on (list separately) in conjunction with the primary procedure code for excision, scar revision, or soft-tissue reconstruction. A realistic patient scenario: a 45-year-old patient with a symptomatic hypertrophic scar of the forearm undergoes scar revision and the surgeon applies amchothick material over a 12 cm2 area to augment soft-tissue contour; the primary procedure CPT for scar revision is reported and Q4368 is reported in addition, with documentation of the treated area and units billed.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    13131Repair, complex, forehead, cheeks, eyelids, nose, lips; 1.1 cm to 2.5 cmUsed for complex layered closure or scar revision where Q4368 may be applied as adjunctive thickening material to optimize contour.
    14040Adjacent tissue transfer or rearrangement, forehead, cheeks, chin, mouth, neck; 10.1 cm to 30.0 cmPerformed for reconstruction after excision where amchothick is used per square centimeter to fill/augment tissue defects.
    11440Excision, benign lesion including margins, except skin tag (unless otherwise specified); 1.1 cm to 2.0 cmRepresents typical excisional procedures preceding placement of additive material like Q4368 when additional soft-tissue thickness is required.
    13132Repair, complex, forehead, cheeks, eyelids, nose, lips; 2.6 cm to 7.5 cmLarger complex repairs where the add-on product is applied across measured square centimeters and billed per Q4368.
    15777Dermal substitute, implantation of biologic or synthetic; trunk or extremityRelated reconstructive technique where an adjunctive thickening product may be used and billed in conjunction with primary reconstructive codes.

    Related Modifiers

    8 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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207Q00000XFamily Medicine PhysicianFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
    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…
    367500000XCertified Registered Nurse Anesthetist(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, prov…
    2083B0002XObesity Medicine (Preventive Medicine) PhysicianA physician who specializes in the treatment of obesity demonstrates competency in and a thorough understanding of the treatment of obesity and the ge…
    226300000XKinesiotherapistA provider trained and educated in the applied science of medically prescribed therapeutic exercise, education and adapted physical activities designe…
    261QR0405XSubstance Use Disorder Rehabilitation Clinic/CenterAmbulatory Health Care Facilities · Clinic/Center
    261QH0100XHealth Service Clinic/CenterAmbulatory Health Care Facilities · Clinic/Center

    Related ICD-10-CM Codes

    28 rows

    ICD-10-CM CodeDescription
    B35.1Tinea unguium
    B35.2Tinea manuum
    B35.3Tinea pedis
    B35.4Tinea corporis
    B36.9Superficial mycosis, unspecified
    I83.819Varicose veins of unspecified lower extremity with pain
    I83.90Asymptomatic varicose veins of unspecified lower extremity
    L03.115Cellulitis of right lower limb
    L50.9Urticaria, unspecified
    L57.0Actinic keratosis

    Showing 1–10 of 28

    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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