Summary & Overview
HCPCS A2018: Permeaderm C, Per Square Centimeter
HCPCS Level II code A2018 designates Permeaderm C billed per square centimeter as an add-on supply in addition to a primary procedure. This code matters nationally because it standardizes reporting and reimbursement for surface-area–based wound care materials and topical products used during ambulatory procedures and wound care encounters. Clear coding for add-on products affects billing accuracy, clinical documentation, and payment consistency across payers.
Key payers covered in this summary include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical purpose and typical sites of service, common modifiers associated with this code, and national considerations for billing and documentation. The publication provides benchmarks and payer policy context where available, highlights documentation elements that support correct add-on billing, and summarizes common payer-level variations and policy updates that influence reimbursement decisions.
This resource is intended for coding professionals, billing managers, and clinical staff who need a national-level reference for applying HCPCS Level II code A2018 to wound care and ambulatory procedural encounters. Data not available in the input are noted where specific payer policies, taxonomies, ICD-10 diagnoses, and related codes would otherwise be detailed.
Billing Code Overview
HCPCS Level II code A2018 refers to Permeaderm C, billed per square centimeter as an add-on, listed separately in addition to the primary procedure. This code describes a topical or surface wound treatment product applied and billed by surface area.
Service type: Topical wound care product application / dressing material
Typical site of service: Outpatient clinics, outpatient surgical centers, wound care clinics, and other ambulatory settings where the primary procedure for which an add-on dressing or topical product is applied is performed.
Clinical & Coding Specifications
Clinical Context
A patient with a full-thickness or partial-thickness wound (e.g., chronic diabetic foot ulcer, venous leg ulcer, traumatic skin loss, or surgical dehiscence) requires application of a permeable dermal substitute product measured and billed by square centimeter using A2018 as an add-on. In a typical encounter, a wound care or surgical team evaluates the wound in an outpatient clinic or ambulatory surgery center, measures the wound bed, performs necessary debridement and hemostasis, selects the appropriate dermal matrix size, and applies the graft or dressing. The product is supplied in discrete sizes; billing uses A2018 to report the square centimeter quantity of Permeaderm C in addition to the primary procedure code for grafting, debridement, or wound closure. Typical sites of service include outpatient wound care clinics, hospital outpatient departments, and ambulatory surgery centers. Common patient scenarios include a patient with a nonhealing diabetic foot ulcer undergoing debridement and placement of a dermal substitute, or a patient with traumatic skin loss receiving grafting in the ambulatory surgery center.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier (default) | Use when no special circumstances apply and standard billing is appropriate. |