Wound Care Billing Audit
Wound care is one of the most scrutinized areas in Medicare billing. Make sure depth, size and product documentation support every claim.
Wound care claims are paid on detail. Debridement codes depend on the deepest tissue removed and the surface area treated, skin substitute application codes depend on wound size and location, and the products themselves are billed separately by square centimeter. Selective debridement (97597/97598) and surgical debridement by depth (11042–11047) are frequently confused, and repeated applications or debridements without documented wound progress draw medical-necessity denials. Skin substitutes are also under heavy scrutiny, with recent Medicare changes to how they are covered and paid. Our audit reviews wound measurements, depth documentation, product usage and waste records, and treatment plans against the claims for a sample of patients.
Audit red flags
- Surgical debridement (11042 and above) billed when the note only describes removing slough or devitalized tissue from the wound surface.
- Weekly debridements or skin substitute applications continued without measurements showing the wound is progressing.
- Skin substitute units billed for the full product size without documenting the amount applied and discarded.
- No documentation of the standard wound care tried before advanced products were used.
Audit action plan
- 1. Wound Documentation Sample — Review a sample of encounters for measurements, depth of tissue removed and progress toward healing across the course of treatment.
- 2. Product & Waste Reconciliation — Match skin substitute invoices and applied sizes against billed units and waste modifiers.
- 3. Frequency & Policy Check — Compare the number and timing of debridements and applications with Medicare and commercial coverage policies.
Codes reviewed
- 97597 / 97598 — Selective debridement, first 20 sq cm / each additional 20 sq cm
- 11042–11047 — Surgical debridement by depth (subcutaneous tissue, muscle/fascia, bone)
- 15271–15278 — Skin substitute application by wound size and location
- Q4xxx + JW / JZ — Skin substitute products (per sq cm) and waste reporting
Frequently asked questions
What is the difference between 97597 and 11042?
97597 is selective debridement of devitalized tissue from the wound surface. 11042 and the codes that follow are surgical debridement codes chosen by the deepest level of tissue removed — subcutaneous tissue, muscle or fascia, or bone. The procedure note has to state the depth reached for a surgical debridement code to be supported.
How are skin substitute products billed?
The application is billed with 15271–15278 based on wound size and location, and the product is billed separately with its HCPCS code in square-centimeter units. For Medicare, report any discarded amount with modifier JW, or JZ when nothing was discarded from a single-use product.
Why do wound care claims get medical-necessity denials?
Payers expect measurable wound progress, a treatment plan and, before advanced products, a documented period of standard wound care. Claims for repeated services without that evidence are frequently denied or recouped.