Summary & Overview
HCPCS Q4186: Epifix Biologic Graft, Per Square Centimeter
HCPCS Level II code Q4186 denotes Epifix billed per square centimeter as an add-on product reported in addition to a primary procedure. This code identifies a biologic graft material used to support wound healing and tissue repair in operative and wound-care settings. The code is nationally relevant because biologic grafts are commonly used across surgical specialties and wound-care practices, and per-unit billing can affect procedure-level costs and reimbursement workflows.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how the code is used in clinical contexts, typical sites of service, and the implications of per-square-centimeter add-on billing. The publication outlines common modifiers and payer considerations for billing workflows, summarizes typical clinical scenarios where Epifix is applied, and highlights data availability and gaps.
This summary is intended for revenue cycle professionals, clinicians involved in procedural wound care, and policy analysts seeking a concise reference on HCPCS Level II code Q4186. Data not available in the input is identified where applicable.
Billing Code Overview
HCPCS Level II code Q4186 represents Epifix, billed per square centimeter as an add-on product that is reported separately in addition to the primary procedure. This code describes a biologic graft material used to support wound healing and tissue repair.
Service type: Biologic graft / tissue product
Typical site of service: Operative and wound care settings, including hospital operating rooms and outpatient wound care clinics where graft materials are applied during surgical or procedural care.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a chronic, non-healing lower extremity wound (for example, a diabetic foot ulcer refractory to standard care for several weeks) who presents to an outpatient wound care clinic or ambulatory surgery center for advanced biologic graft application. The clinical workflow begins with wound assessment, debridement and hemostasis under local anesthesia or monitored anesthesia care as appropriate, measurement of the wound bed to determine square centimeters of graft required, and selection of the Q4186 product (Epifix, per square centimeter) as an add-on to the primary wound repair or debridement procedure. The provider documents wound characteristics (size, depth, presence of infection, vascular status), prior treatments, informed consent for use of a placental-derived membrane product, and the exact number of square centimeters applied. Billing occurs as an add-on HCPCS Level II code billed in addition to the primary CPT procedure for debridement or wound repair. Typical sites of service include outpatient wound care clinics, ambulatory surgical centers, and hospital outpatient departments. Common patient scenarios include diabetic foot ulcers, venous stasis ulcers, pressure injuries with viable wound bed after debridement, and surgical wounds with delayed healing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Data not available in the input. |