A skilled nursing facility resident's wound care claim can be billed correctly by three parties, the facility, the treating physician, and the skin substitute supplier, and Medicare pays each under a different rule. SNF consolidated billing, created by the Balanced Budget Act of 1997, bundles most services furnished during a covered Part A stay into the facility's single per diem rate. Debridement and skin substitute grafts sit differently inside that bundle, and a claim on the wrong side of the Part A and Part B line is now one of Medicare's most closely reviewed billing patterns. The Office of Inspector General and Medicare's post-payment review contractors are treating skilled nursing facility wound care as an active audit target.
SNF Consolidated Billing and the Part A Bundle
Consolidated billing requires a skilled nursing facility to submit one bundled claim to its Part A Medicare Administrative Contractor for the majority of services furnished during a covered Part A stay, including most facility-delivered wound care. Physician professional services are excluded from consolidated billing and stay separately billable to Part B under the physician's own provider number, even while the stay is Part A covered. Routine dressing changes fall inside the facility's bundled cost, while debridement personally performed by a physician is billed outside it. Billing the facility for work a physician performed, or billing Part B for nursing care, is the first pattern an auditor looks for.
Skin Substitutes and the Place-of-Service Problem
Skin substitute billing has become its own audit category. The Office of Inspector General's September 2025 data snapshot found Medicare Part B spending on skin substitutes surpassed $10 billion annually by the end of 2024, and it called the category "particularly vulnerable to questionable billing and fraud schemes." The same report found skin substitute costs billed for patients treated at home ran roughly four times higher than the same care billed in an office, evidence that place of service drives payment and scrutiny alike. A skilled nursing facility carries a parallel exposure: a skin substitute applied during a covered Part A stay is bundled into the per diem, while the same product applied once Part A benefits are exhausted becomes a separate Part B claim.
Whose Documentation Supports the Claim
A Part B debridement or skin substitute claim billed on top of a Part A stay stands or falls on whose documentation supports it. Local coverage determinations for wound care require the treating physician's own assessment and medical necessity finding, not a reference to the facility's records. A Part B claim that leans on the SNF's flow sheet, rather than the physician's own documented visit, reads to a reviewer as facility work billed a second time. The signature log and the physician's independent note separate a defensible Part B claim from one an auditor treats as duplicate billing.
A skin substitute or a debridement billed on the wrong side of the Part A and Part B line, without the physician's own documentation behind it, is the fastest way a skilled nursing facility wound care claim turns into an extrapolated demand.
How a Sample Becomes an Extrapolated Demand
OIG's post-payment reviews of skilled nursing facilities show how a documentation gap becomes a large recoupment. In a November 2025 audit, OIG reviewed 100 sampled claims from Pinnacle Multicare Nursing and Rehabilitation Center for 2020 and 2021 and found 99 failed to meet Medicare payment requirements, producing $1.1 million in sampled overpayments extrapolated to an estimated $31.2 million across the full claim population. The audit was not wound-care-specific, but its method, a small sample projected across a multi-year lookback, is the same method contractors apply to wound care and skin substitute claims. A handful of flagged claims with a missing physician note can be projected into a demand far larger than the claims actually reviewed.
Why Early Legal Counsel Is Critical
It is critical that skilled nursing facilities and the wound care providers who treat their residents promptly retain experienced healthcare defense counsel upon receiving an audit notice, a records request, or any other government inquiry touching Part A or Part B wound care billing. Early legal intervention can protect the facility's and the practitioner's rights, ensure the response addresses the sample and extrapolation methodology rather than only the flagged claims, and let counsel communicate with the auditor 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 skilled nursing facilities, wound care practices, and treating physicians against RAC, UPIC, and OIG post-payment reviews of skin substitute audit defense billing, from the records request through the appeal. Our bench includes a former federal prosecutor. If your facility has received a notice touching SNF wound care billing, contact us today for a free consultation.
