HCPCS Level II code G0682 describes the application of a premarket approval (PMA), 510(k), or 361 human cells, tissues, or cellular and tissue-based product (HCT/P) non-sheet form skin substitute as an add-on for additional wound surface area; the code covers each additional 25 square centimeters (or part thereof) for wounds up to 100 sq cm and is billed in conjunction with the primary skin substitute application procedure, typically performed as a wound care service in outpatient clinic, wound center, or ambulatory surgical settings.