Summary & Overview
HCPCS Level II Q4201: Matrion, per Square Centimeter (Add-on)
HCPCS Level II code Q4201 designates Matrion billed per square centimeter as an add-on supply to be reported in addition to a primary procedure. As a product-based add-on code, Q4201 matters nationally because it affects billing for procedures that require specialized topical or graft-like materials and can influence overall procedural charges and reporting consistency across payers. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what Q4201 represents clinically and operationally, which payers include coverage policies for product add-ons, and where to look for benchmark and policy language related to add-on supply reporting. The summary includes guidance on typical service settings and coding context, plus an overview of common modifiers and other billing elements associated with add-on supply reporting when data are available. Data not available in the input is clearly noted where applicable.
Billing Code Overview
HCPCS Level II code Q4201 describes Matrion billed per square centimeter as an add-on, to be listed separately in addition to the primary procedure. This code represents a product-based accessory used during procedural care when Matrion is applied and is billed on a per-square-centimeter basis.
Service Type: Supply/product add-on associated with a procedure
Typical Site of Service: Outpatient procedural settings, ambulatory surgery centers, or hospital outpatient departments where topical or graft-related products are applied as part of a primary procedure
Clinical & Coding Specifications
Clinical Context
A patient with a full-thickness skin defect following tumor excision or traumatic loss undergoes reconstruction using a dermal matrix product applied to the wound bed. The product billed with Q4201 (Matrion, per square centimeter) is used as an add-on to the primary procedure for placement of a biologic or synthetic dermal substitute. Typical patients include adults or pediatric patients with chronic wounds, post-oncologic resection defects, or deep partial- to full-thickness burns where staged reconstruction is planned.
The clinical workflow: the surgical team performs initial debridement or excision (primary procedure), achieves hemostasis, and measures the graft site in square centimeters. The dermal matrix product is fenestrated or trimmed to fit and secured to the wound bed with sutures, staples, or biologic adhesives. Placement of the matrix may be done in the operating room or an ambulatory procedure suite. Post-placement care includes dressings, possible negative-pressure wound therapy, and scheduled follow-up for assessment of integration prior to any subsequent skin grafting or definitive closure. Documentation must include product name, square centimeters applied, primary procedure linkage, and any relevant modifiers to reflect circumstances of the service.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier; neutral reporting |