Summary & Overview
HCPCS Q4138: Biodfence Dryflex, Per Square Centimeter
HCPCS Level II code Q4138 denotes Biodfence dryflex billed per square centimeter as an add-on material supplied in conjunction with a primary surgical procedure. This code matters nationally because it standardizes reporting for a biologic implant/barrier material, enabling consistent claims submission and aggregation of utilization and cost for adjunctive surgical supplies.
Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code's clinical role, the typical sites of service where the product is used (hospital outpatient departments, ambulatory surgery centers, and similar procedural settings), and the billing context for an add-on, per-area supply.
This publication provides benchmarks and policy-relevant context for facility and professional billing, highlights common billing modifiers and claim-line considerations (listed separately), and outlines the clinical scenarios in which a per-square-centimeter biologic barrier is typically applied. Data elements not present in the input are noted as unavailable. The content is intended for national audiences involved in coding, revenue cycle, clinical supply management, and policy analysis.
Billing Code Overview
HCPCS Level II code Q4138 describes Biodfence dryflex billed per square centimeter as an add-on supply reported separately in addition to a primary procedure. The service represents a biologic/surgical barrier material used in procedures requiring localized grafting or barrier placement.
Service type: Surgical implantable/adjunctive biologic material
Typical site of service: Hospital outpatient department, ambulatory surgery center, or other procedural setting where surgical implants or biologic barrier materials are used
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A patient presents to an outpatient surgical clinic or ambulatory surgery center with a full-thickness soft tissue defect following an abdominal wall repair complicated by fascial separation and risk of bowel adhesion, or after removal of an infected mesh. The surgeon plans placement of a resorbable biologic barrier to reduce adhesions and reinforce soft tissue coverage over viscera. During the sterile operative procedure, the surgeon measures the area to be covered and applies a sheet or patch product billed by surface area; the product described as Q4138 (Biodfence dryflex, per square centimeter) is added to the primary operative procedure line item as an add-on supply. Typical workflow: preoperative consent and diagnosis coding, intraoperative measurement of graft coverage in square centimeters, documentation of product lot number and unit count in the operative note, application technique and fixation method in the operative note, and postoperative instructions for wound care and follow-up. Typical sites of service include the ambulatory surgery center, hospital outpatient department, or inpatient operating room depending on patient complexity and comorbidities.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — standard reporting | Use when no special circumstances or modifiers apply to the primary procedure and add-on supply. |