Summary & Overview
HCPCS Q4319: Sanograft per Square Centimeter (Add-on Supply)
HCPCS Level II code Q4319 designates Sanograft billed per square centimeter as an add-on supply that is reported in addition to a primary surgical procedure. This code is relevant for surgical specialties that use biologic graft materials for tissue repair or reconstruction and affects hospital outpatient departments, ambulatory surgical centers, and inpatient operating rooms where graft supplies are billed separately. Nationally, accurate reporting of add-on graft supply codes like Q4319 influences claim adjudication, supply cost accounting, and clinical documentation for procedures requiring biologic grafts.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will gain a clear understanding of the clinical context in which Q4319 is used, the types of sites that typically bill it, and the practical implications for billing as an add-on supply. The report outlines common billing practices, coding relationships, and areas where payers and facilities commonly require clear documentation to support separate billing of graft materials.
Content in this publication covers benchmarks and common payer considerations, relevant policy and coverage themes affecting add-on graft supply codes, and guidance on documentation elements that support medical necessity. Data not available in the input is identified where applicable.
Billing Code Overview
HCPCS Level II code Q4319 represents Sanograft, billed per square centimeter as an add-on, list separately in addition to primary procedure. This code is used to report the supply of Sanograft material when applied during a surgical procedure that requires grafting.
Service type: Graft material supply (biologic graft)
Typical site of service: Operating room or procedural suite in an inpatient or outpatient surgical setting
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with a full-thickness lower extremity wound after wide local excision of necrotic tissue and debridement presents for biologic skin substitute application. The surgical team prepares and measures the wound area intraoperatively. Q4319 (Sanograft, per square centimeter) is applied as an add-on product to cover the defect and support epithelialization. The typical clinical workflow includes surgical debridement and hemostasis, measurement of the graft area in square centimeters, selection and preparation of the Sanograft material, application and securement to the wound bed (may require adjunctive dressings or negative pressure wound therapy), and documentation of the exact square centimeters used. Post-procedure care includes dressing changes, serial wound assessments, and possible repeat applications if clinically indicated. Typical sites of service include outpatient surgical centers, hospital outpatient departments, and inpatient operating rooms when performed during a primary procedure. Common patient scenarios include non-healing diabetic foot ulcers, venous stasis ulcers after debridement, surgical excision defects, and complex traumatic soft tissue loss where a biologic graft is used as an adjunct to reconstructive management.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default, no modifier | Used when no specific modifier applies to the service |