Summary & Overview
HCPCS Q4393: Surgraft per Square Centimeter (Add-on)
HCPCS Level II code Q4393 denotes a surgraft product billed per square centimeter as an add-on item in conjunction with a primary surgical procedure. This code is used to capture surface-area–based grafting supply or application and ensures itemized accounting for graft materials in operative episodes. Nationally, accurate use of add-on supply codes like Q4393 affects clinical documentation, claims adjudication, and product-level cost reporting for reconstructive and wound-management procedures.
Key payers addressed in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical role and service context, a summary of common billing modifiers where available, and guidance on typical sites of service. The publication also outlines what to expect in payer coverage practices and coding workflows at a programmatic level.
This summary prepares billing and clinical staff, coding auditors, and policy analysts to identify where Q4393 fits within surgical encounters, how it is reported as an add-on item, and the types of benchmarks and policy updates readers should monitor for accurate reimbursement and compliance. Data not available in the input are noted where applicable.
Billing Code Overview
HCPCS Level II code Q4393 represents Surgraft ac priced per square centimeter and is designated as an add-on service that must be listed separately in addition to the primary procedure. The description indicates a grafting product or application billed by surface area.
Service type: Graft product or surgical grafting supply billed per unit area
Typical site of service: Operating room or outpatient surgical setting where grafting procedures are performed
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult who sustained a full-thickness skin loss from trauma, burns, or surgical excision of scarred tissue and requires placement of a cultured epidermal graft product (Q4393) applied per square centimeter as an add-on to a primary wound or excision procedure. The clinical workflow begins with wound assessment in an outpatient or inpatient surgical setting (operating room, burn unit, or procedure suite). The surgeon debrides nonviable tissue and prepares the wound bed, documents wound dimensions, and places the primary procedure code for the debridement or excision. The Q4393 add-on item is billed in square centimeters for the amount of Surgraft ac graft material used to cover the prepared defect. Typical sites of service include inpatient hospital, ambulatory surgical center, outpatient procedure clinic, and specialized burn centers. Common patient comorbidities include diabetes mellitus with poor wound healing, peripheral vascular disease, or large surface-area burns. Documentation elements include wound measurements in cm2, indication for grafting, description of primary procedure, product lot numbers, graft quantity used, and operative note linking Q4393 to the primary procedure.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 |