Summary & Overview
HCPCS Q4115: Alloskin, Biologic Allograft Skin per cm²
HCPCS Level II code Q4115 describes Alloskin billed per square centimeter, an add-on supply code used when biologic allograft skin is provided in addition to a primary surgical or wound-care procedure. This code matters nationally as biologic skin grafts are used in complex wound management and burn care and can represent a significant component of procedural supply costs. Coverage and billing practice variation across major payers affect access to these products and facility reimbursement.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for use of allograft skin, common sites of service where the product is applied, and typical service types tied to the code. The publication highlights where data is available on payer coverage and coding applications, and it identifies gaps where input was not provided.
The content provides benchmarking context, policy and coding considerations relevant to facilities and billing teams, and practical detail on the nature of the service associated with Q4115. Data not available in the input is noted where applicable; the focus remains on national applicability rather than state-specific policies.
Billing Code Overview
HCPCS Level II code Q4115 denotes Alloskin billed per square centimeter as an add-on, listed separately in addition to the primary procedure. The code represents the supply of biologic allograft skin product measured by surface area.
Service type: Biologic skin graft / allograft supply
Typical site of service: Operating room, surgical suite, or burn/wound care center
Clinical & Coding Specifications
Clinical Context
A patient with a full-thickness or deep partial-thickness skin loss after trauma or surgical excision of a lesion presents to a hospital-based operating room or an ambulatory surgical center for wound coverage. The surgeon performs debridement and prepares the wound bed; biologic skin substitute Q4115 (Alloskin) is applied as an add‑on product charged per square centimeter to improve temporary coverage, reduce fluid losses, and support healing prior to definitive closure or grafting. Typical workflow: preoperative evaluation and wound assessment; measurement of defect in square centimeters; operative debridement and hemostasis; application and fixation of Alloskin over the prepared wound bed; dressing application and postoperative wound care instructions. Typical sites of service include hospital inpatient, hospital outpatient department, and ambulatory surgery center. Typical patient scenario: an adult with a traumatic lower-extremity degloving injury managed in the operating room where Q4115 is applied as an adjunct to primary wound management and billed in addition to the primary debridement or grafting procedure.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier—standard billing | Use when no other modifier is applicable and claim is submitted with standard status. |