Summary & Overview
HCPCS Q4302: Complete aca, per Square Centimeter (Add-on)
HCPCS Level II code Q4302 designates an add-on service for reporting a complete aca measurement billed per square centimeter. As an add-on code, Q4302 is used in conjunction with a primary procedure to capture additional work for area-based measurement. Nationally, add-on codes like Q4302 matter because they affect how procedures are documented and reimbursed when extra measured work is performed.
Key payers in this review include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an explanation of the code’s clinical and billing intent, typical sites of service, and the common payer landscape where the code may be recognized. The publication also outlines benchmarks and policy context relevant to add-on HCPCS reporting, clarifies common modifiers and billing practices, and summarizes implications for documentation and claims submission.
This summary is written for a national audience and focuses on the code’s purpose, payer coverage considerations, and the practical contexts in which the code is applied. Data not provided in the input—such as associated taxonomies, specific ICD-10 pairings, and payer-specific reimbursement rates—is noted as unavailable.
Billing Code Overview
HCPCS Level II code Q4302 describes a billing add-on for complete aca, billed per square centimeter. This code is intended to be reported in addition to a primary procedure when calculation of the complete aca area is required and reimbursed separately.
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Service type: Measurement and reporting of complete aca area, per square centimeter
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Typical site of service: Procedures where the primary service involves areas measured in square centimeters; commonly billed in ambulatory surgical settings or outpatient procedural environments
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A patient with a chronic full-thickness wound (for example, a chronic pressure ulcer or diabetic foot ulcer) presents to an outpatient wound care clinic for advanced topical therapy. The clinician determines that a complete application of amorphous calcium alginate (ACA) dressing is indicated and documents the treated surface area in square centimeters. The procedure is billed as an add-on supply per square centimeter using Q4302 in addition to the primary wound debridement or repair procedure. Typical workflow: assessment and measurement of wound dimensions, wound cleansing and debridement as indicated, selection and application of the ACA dressing across the entire wound surface, securement of the dressing, post-application instructions and scheduling follow-up wound checks. Common sites of service include hospital outpatient departments, ambulatory surgical centers, physician office-based wound care clinics, and specialized infusion or wound centers. Typical patient scenarios include chronic nonhealing ulcers, surgical wounds requiring advanced dressing coverage, and traumatic skin loss where a complete ACA dressing application per square centimeter is required as an adjunct to the primary procedure.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Standard reporting when no specific modifier applies |