Medicare contractors are tightening what counts as an adequate chart before they pay for venous leg ulcer treatment, and the compression-therapy record is the first document a reviewer pulls. Local Coverage Determination L33831 pays for compression bandages only over a qualifying wound: surgically created, surgically modified, or debrided, and denies the claim when the chart does not establish that status. The same record also supplies the conservative-therapy proof Medicare requires before it will cover a pneumatic compression device or a skin substitute graft. A provider whose compression notes are thin is exposed at every rung of that ladder.
The Qualifying-Wound Requirement For Compression Bandages
Under LCD L33831, compression bandages and multi-layer systems are covered only as a dressing over a wound meeting Medicare's definition of a qualifying wound: surgically created, surgically modified, or debrided. A venous leg ulcer that has not been debrided, or whose chart does not document it, fails the definition no matter how clinically appropriate the compression is. The policy prices the bandage layers under separate HCPCS codes, light compression (A6448-A6450) and moderate or high compression (A6451, A6452) among them, and each layer's necessity rises and falls with the same wound-status documentation. A supplier billing the system also needs a signature log on file; missing either turns a documentation gap into an unsupported claim.
Visit-By-Visit Documentation Under The Wound Care LCD
A separate wound care policy, LCD L37228, revised effective March 27, 2025, sets the standard for what the chart must show at each debridement visit: wound dimensions and depth, tissue type removed, the method and instrument used, and, at least every ten days, an updated measurement. The same chart is also where site-of-service billing gets tested: a physician's office and a hospital-based wound center bill under different codes and rates, and reviewers check the site the chart describes against the site the claim reports. For venous ulcers, the policy treats a wound that has not reduced by at least 40% after four weeks as unlikely to heal on the existing plan, and expects the record to show the plan changed in response.
The Six-Month Record Behind Advanced Products
Medicare's national coverage rule for home pneumatic compression devices, NCD 280.6, requires a venous stasis ulcer that has failed to heal after a documented six-month trial of conservative therapy, compression bandaging or a garment, dressings, exercise, and limb elevation, directed by the treating physician. The same record functions as the necessity narrative behind the escalation pathway more broadly, including the decision to apply a skin substitute graft. CMS's proposed LCD for skin substitute grafts, issued jointly across the MACs on April 25, 2024, ties coverage to evidence the products close diabetic foot and venous leg ulcers faster than the standard of care already reflected in the chart. A provider who skips the compression-and-elevation record and moves to the advanced product has removed the baseline the claim depends on.
The compression record carries more weight than paperwork behind the venous leg ulcer treatment: it is the medical necessity finding that every later claim, the bandage, the pump, and the skin substitute graft, is built on.
Where Compression Documentation Meets Skin Substitute Scrutiny
Medicare Part B spending on skin substitute grafts surpassed $10 billion annually by the end of 2024, and the Office of Inspector General (OIG) has called the category vulnerable to questionable billing, citing home-based costs running roughly four times office-based costs. Reviewers working a skin substitute audit routinely pull the compression chart first, because the LCDs above make the conservative-therapy record, not the graft claim, the place where medical necessity is won or lost. A provider defending a debridement finding or a skin substitute FCA matter is defending the compression documentation that came before it.
Why Early Legal Counsel Is Critical
It is critical that wound care providers promptly retain experienced healthcare defense counsel upon receiving an audit notice, documentation request, or other government inquiry tied to venous leg ulcer or skin substitute claims. Early legal intervention can protect the provider's appeal rights, ensure the response addresses the specific LCD requirement at issue rather than only the flagged claims, and let counsel communicate with the contractor on the provider's behalf. Delaying representation can significantly affect the outcome and expose the provider to recoupment and referral risk a timely response could limit.
How Health Law Alliance Can Help
Health Law Alliance defends wound care providers nationwide against Medicare and Medicaid audits touching venous leg ulcer treatment, compression therapy, debridement coding, and skin substitute billing, from the documentation request through appeal and, where the government alleges overbilling, False Claims Act defense. Our bench includes a former federal prosecutor, and the firm builds each defense within the same LCDs the reviewer applies. If your practice has received a wound care audit notice, contact us today for a free consultation.
