Two debridement codes describe two different procedures, and the operative note is the only place that distinction gets made. Selective debridement (CPT 97597/97598) removes slough, biofilm, and other non-viable tissue without cutting into the wound bed. Excisional debridement (CPT 11042-11047) is a surgical procedure that cuts into living tissue, fat, muscle, fascia, or bone, to reach a clean margin. Medicare pays the excisional codes at a materially higher rate, and that gap is what wound care auditors are trained to test. When the note does not describe the tissue actually removed, the claim does not support the code billed, regardless of what the provider intended to do.
The Clinical Distinction Between the Two Codes
Selective debridement removes tissue that is already dead: slough, devitalized epidermis or dermis, exudate, and debris sitting on top of the wound bed. It is typically performed with forceps, scissors, curette, or high-pressure irrigation, and it does not require anesthesia. Excisional debridement is a different act entirely. It cuts into viable tissue, past the wound bed, using a scalpel or sharp curette, until the surgeon reaches a bleeding margin. CPT 11042 covers subcutaneous tissue, CPT 11043 covers muscle and fascia, and CPT 11044 covers bone, each for the first 20 square centimeters, with add-on codes 11045, 11046, and 11047 for each additional 20 square centimeters. The code family is a depth ladder, and only the tissue the provider actually excised moves a claim up it.
What Medicare Requires the Operative Note to Contain
Medicare's coverage articles for debridement services are specific about what the record must show, not just what the provider remembers doing. The operative note needs the anatomical location, the instrument used, anesthesia if any was administered, the type of tissue removed, and the depth and area of the wound. Wound measurements must appear by description, drawing, or photograph, and the note has to describe tissue involvement itself: necrosis, undermining, tunneling, infection, or reduced circulation. This is the evidence a reviewer uses to match the code to the procedure, the same chart-level standard covered in Medicare Wound Care Documentation: The Chart That Survives Audit.
Why Wound Depth Alone Does Not Justify an Excisional Code
The most common documentation failure is billing the excisional code because the wound itself is deep, not because the procedure removed muscle, fascia, or bone. CMS guidance is explicit: the code selected has to reflect the level of tissue debrided, not the extent, depth, or stage of the ulcer or wound. A stage 4 pressure ulcer can be treated with selective debridement if only slough is removed. A shallow wound can support an excisional code if the provider actually cut to fascia. Severity and procedural depth are not the same fact, and a note that documents one without the other supports neither code. Medicare's coverage rules also require the record to document that necrotic, devitalized, or fibrotic tissue was actually present, since debridement on a wound with no such tissue is not medically necessary regardless of the code billed.
The CPT code has to match the tissue the provider removed, not the depth of the wound being treated. A note that documents wound severity without documenting what was excised supports neither code with confidence.
The Documentation Gap That Drives Recoupments
Wound care auditors, including the reviewers behind the 2025 Vohra Wound Physicians $45 million settlement, focus on exactly this gap: excisional codes billed on notes that describe wound depth and stage but never state what tissue the instrument removed. Debridement Coding Audits: Depth, Documentation, and CPT 11042-11047 walks through the patterns reviewers flag first. Where the record does not establish tissue depth, the claim cannot support an excisional code, and the practice is exposed to a recoupment demand across the full lookback period through extrapolation, or placed on prepayment review before the next claim pays. The fix is the specific sentence that names the tissue removed, the instrument used, and the resulting wound bed, on every encounter.
Why Early Legal Counsel Is Critical
It is critical that wound care providers promptly retain experienced healthcare defense counsel upon receiving a debridement audit notice, prepayment review request, or other government inquiry. Early legal intervention can protect the provider's rights, ensure appropriate responses to the contractor's requests, avoid inadvertent admissions, preserve every available defense, and let counsel communicate with the contractor on the provider's behalf. Delaying representation can significantly affect the outcome and expose the provider to unnecessary risk.
How Health Law Alliance Can Help
Health Law Alliance defends wound care providers against debridement coding audits and skin substitute reviews, from the initial documentation request through appeal. Our bench includes attorneys who have handled the operative-note-level detail these audits turn on. If your practice has received a debridement audit notice or a prepayment review request, contact us for a free, confidential consultation.
