Summary & Overview
HCPCS Q4137: Amnioexcel/Amnioexcel Plus/Biodexcel per sq cm
HCPCS Level II code Q4137 denotes the per-square-centimeter billing of Amnioexcel, Amnioexcel Plus, or Biodexcel as an add-on biologic product used to support wound healing and tissue repair. This code is significant nationally because it standardizes reporting for amniotic membrane products that are increasingly used as adjuncts in wound care and surgical reconstruction. Accurate coding affects payment, utilization monitoring, and clinical documentation across inpatient and outpatient settings.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for amniotic membrane adjuncts, payer coverage considerations, common modifiers and billing practices, and benchmarks where available. The publication also summarizes coding guidance and typical sites of service for use of these products.
The analysis provides practical information for billing and compliance teams, including commonly seen billing modifiers and where the product is billed as an add-on to a primary procedure. It highlights areas where payers may differ in coverage policies, documentation expectations, and prior authorization requirements. Data not available in the input will be noted where relevant.
Billing Code Overview
HCPCS Level II code Q4137 describes Amnioexcel, Amnioexcel Plus, or Biodexcel, billed per square centimeter as an add-on product to be listed separately in addition to a primary procedure. The code represents biologic amniotic membrane products used to support wound healing and tissue repair.
Service Type: Biologic amniotic membrane application / graft adjunct
Typical Site of Service: Outpatient wound care clinics, hospital outpatient departments, ambulatory surgical centers, and physician offices providing wound management
Clinical & Coding Specifications
Clinical Context
A patient with a non-healing surgical wound or chronic dermal defect is evaluated in an outpatient wound care clinic or hospital-based wound center. After debridement and assessment of wound size and depth, the clinician determines that an amniotic membrane product such as Q4137 (AmnioExcel / AmnioExcel Plus / BioDexcel, per square centimeter) is indicated as an adjunctive biologic dressing to promote healing. The typical workflow: wound measurement and documentation of dimensions; photographic documentation; cleansing and sharp or enzymatic debridement as required; selection and sizing of the amniotic membrane graft measured in square centimeters; application of the product to the prepared wound bed; securing the graft with appropriate dressings and, if needed, secondary closure techniques; and scheduling follow-up visits for dressing changes and assessment of graft integration. Common settings include outpatient wound clinics, ambulatory surgery centers for larger or complex wounds, and inpatient hospital units for acute or post-operative wounds. Billing for Q4137 is submitted as an add-on supply item in addition to the primary procedural code for wound care or debridement, with measurement and quantity documented precisely in the medical record.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |