Summary & Overview
HCPCS Q4360: Amchoplast per Square Centimeter, Add-On
HCPCS Level II code Q4360 designates Amchoplast material billed per square centimeter as an add-on supply to a primary surgical procedure. This code captures unit-based reporting for implantable or graft-like surgical adjuncts used commonly in dural repair or soft-tissue reinforcement. Nationally, clear add-on supplies coding supports accurate procedural cost capture and claims processing for hospitals and ambulatory surgical centers.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. The publication outlines payer coverage posture, common billing practices, and coding context for procedural settings.
Readers will find concise benchmarks for use frequency and billing patterns where available, summaries of payer coverage approaches, and clinical context explaining when add-on per-square-centimeter reporting applies. The content also flags typical service lines and sites of service associated with Q4360, and notes when input data are not available. This resource is intended to clarify coding intent and administrative expectations for clinicians, coding professionals, and revenue cycle stakeholders across the U.S.
Billing Code Overview
HCPCS Level II code Q4360 describes Amchoplast fd, per square centimeter (add-on, list separately in addition to primary procedure). This code represents an add-on product billed per square centimeter used in procedures involving application of Amchoplast or similar fascia/duraplasty dressing material.
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Service type: Implantable surgical adjunct or graft material billed as an add-on supply
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Typical site of service: Hospital operating room, ambulatory surgical center, or other procedural settings where surgical grafting or dural repair is performed
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult undergoing reconstructive or cosmetic surgery involving soft tissue augmentation or contouring where an amchoplast filler (amchoplast fd) is used as an add-on material billed per square centimeter (Q4360). The usual workflow begins with a surgical consultation documenting the indication (e.g., soft-tissue defect after tumor excision, traumatic contour deformity, or primary cosmetic contour enhancement). Preoperative planning records the size (cm2) of the area to be filled and documents choice of amchoplast as the implantable or injectable filler adjunct. In the operating room or procedure suite, the primary procedure (for example, excision, flap coverage, or implant placement) is performed; Q4360 is reported as an add-on supply line in addition to the primary procedure code, prorated by the number of square centimeters applied. Operative notes should document the exact square centimeters of amchoplast used, lot numbers, and any intraoperative complications. Typical sites of service include hospital outpatient departments, ambulatory surgical centers, and office-based procedure suites where minor surgical procedures are performed under local, regional, or general anesthesia. Postoperative documentation includes immediate assessment of fill symmetry and any adverse reaction; follow-up visits assess integration, wound healing, and need for additional material, which would be billed as a separate instance of Q4360 if additional product is used.
Coding Specifications
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