Summary & Overview
HCPCS Q4180: Revita, per Square Centimeter (Add-on Product)
HCPCS Level II code Q4180 designates Revita billed per square centimeter as an add-on item reported in addition to a primary procedure. As an add-on product code, Q4180 captures supply or topical adjunct usage measured by surface area, which affects billing detail and reimbursement calculations when paired with the associated primary procedure. Nationally, accurate use of this code matters for clinical documentation, coding consistency, and downstream claims processing because it distinguishes the adjunct product from the primary service.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for adjunct topical products, common billing practices for add-on HCPCS procedures, and what stakeholders typically review when adjudicating these line items. The publication summarizes benchmarks and utilization patterns where available, highlights coding and billing considerations specific to add-on, per-area supply codes, and outlines policy or payment updates that affect reporting and reimbursement for adjunct products. Data not available in the input is indicated where applicable.
Billing Code Overview
HCPCS Level II code Q4180 describes Revita, billed per square centimeter as an add-on, list separately in addition to primary procedure. This code represents a topical or localized product applied or used in conjunction with another primary procedure and is reported in units of surface area (per square centimeter).
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Service type: Product or topical adjunct applied to a treatment site
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Typical site of service: Procedure or outpatient settings where a primary procedure is performed and an adjunct topical product is applied
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with a chronic non-healing diabetic foot ulcer presents to an outpatient wound care clinic for advanced topical biologic therapy. After wound bed preparation (debridement and infection control) and measurement, the clinician applies a per-square-centimeter dose of the allograft/biologic product Revita to the ulcer surface as an add-on material to the primary wound care procedure. The typical clinical workflow includes: evaluation and documentation of wound size and depth, debridement (sharp or enzymatic) as indicated, hemostasis, application of Q4180 per square centimeter of Revita with appropriate dressing, patient education on offloading and wound care, and scheduling follow-up visits to monitor graft take and wound healing. This service is commonly performed in ambulatory surgical centers, hospital outpatient departments, wound care clinics, and specialty physician offices.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work or resources substantially exceed typical requirements for the primary procedure when applying the add-on product requires significantly more effort. |
23 |