Summary & Overview
HCPCS Q4238: Derm-maxx, per square centimeter (topical dermatologic product)
HCPCS Level II code Q4238 designates Derm-maxx billed per square centimeter as an add-on item to be reported in addition to a primary procedure. This code captures surface-area–based billing for a topical dermatologic product used during outpatient dermatology procedures and related ambulatory settings. It matters nationally where payers and providers need consistent reporting for product-based add-ons that affect procedural costs and claims adjudication.
Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what the code represents, the clinical and service contexts in which it is typically used, and which payers commonly address such add-on product billing. The publication outlines expected benchmarks and policy considerations relevant to add-on HCPCS codes, including coding conventions, typical sites of service, and payer coverage patterns where available.
This summary equips coding managers, billing staff, and policy analysts with clear context for HCPCS Level II code Q4238, enabling consistent documentation and claims submission. Data not available in the input is noted where applicable, and readers are directed to payer-specific policies for coverage details.
Billing Code Overview
HCPCS Level II code Q4238 describes Derm-maxx, per square centimeter and is designated as an add-on, list separately in addition to primary procedure. The code represents a topical dermatologic product measured and billed by surface area.
Service Type: Topical dermatologic agent application or product
Typical Site of Service: Outpatient dermatology clinics, ambulatory surgery centers, and other outpatient settings where topical products are applied in addition to a primary procedure
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A patient presents to an outpatient dermatology clinic for wound bed preparation and topical application of a specialized topical agent, Derm-Maxx, to a chronic non-healing ulcer. The patient is positioned on an exam table; the clinician inspects and documents wound size in square centimeters, performs standard wound cleaning and debridement as indicated, and then applies Derm-maxx measured and billed per square centimeter using HCPCS Level II code Q4238 as an add-on to a primary procedure. Typical workflow includes wound assessment, dressing change, possible sharp or enzymatic debridement billed separately, application of the topical agent to the measured wound area, and documentation of the product, amount (cm2), and clinical rationale in the procedure note. Usual sites of service are outpatient dermatology clinics, wound care centers, and hospital outpatient departments. Typical patient scenarios include diabetic foot ulcers, venous stasis ulcers, pressure injuries, or other chronic ulcers requiring adjunctive topical therapy; the product is billed in addition to a primary procedure code for debridement or wound care and may require appropriate modifiers to indicate circumstances such as increased procedural services or discontinued procedures.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — default |