Your wound care practice may rely on nurse practitioners to see patients, perform debridement, and manage ongoing treatment plans. How those visits get billed, under the NP's own National Provider Identifier or as incident-to a supervising physician, is a decision many practices make once and never revisit. That choice creates billing-fraud exposure when the method used does not match what happened in the office that day or what your state's scope-of-practice law allows the NP to do alone.
Independent Billing Versus Incident-To Billing
When a nurse practitioner bills independently, the claim goes out under her own NPI and Medicare reimburses the visit at 85 percent of the physician fee schedule, a rate set by the Balanced Budget Act of 1997 and codified at 42 CFR 414.56. Billing incident-to a supervising physician reimburses the identical service at 100 percent of the physician fee schedule, but only when the conditions in 42 CFR 410.26 are met in full. The physician must have personally performed the initial visit for that condition and documented the plan of care the NP now carries out, and later visits have to stay within that plan rather than address a problem the physician has not yet evaluated.
What Direct Supervision Actually Requires
Meeting the plan-of-care requirement is only half of incident-to billing. The supervising physician also has to provide direct supervision during the visit, meaning physically present in the office suite and immediately available, not on a video call and not simply reachable by phone. The physician need not be in the exam room, but leaving the suite for hospital rounds or a procedure elsewhere breaks supervision for every incident-to claim billed during that absence. A signature log showing which physician was in the suite on a given date, checked against the appointment schedule, is often the first record an auditor requests, since it is the fastest way to test whether the supervision a claim assumes actually existed.
Aligning Billing Method With State Scope of Practice
Billing method is only one variable. Your state's scope-of-practice law determines what an NP may do under her own authority. In a full practice authority state, a nurse practitioner can evaluate, diagnose, and manage treatment, wound care included, without physician involvement, so independent billing there simply reflects authority state law already gives her. Texas is different: its NPs operate under a written delegation or collaborative practice agreement covering prescribing and, depending on its terms, aspects of diagnosis and treatment. Billing incident-to in that setting has to match the agreement on file rather than stand in for authority the NP does not independently hold, and the mismatch runs the other way too when an NP bills independently for work the agreement has not yet authorized her to perform alone.
The Audit Exposure of a Documentation Mismatch
Wound care billing already draws auditor attention on its own terms. Skin substitute selection and sizing, debridement coding, and local coverage determination compliance are common examination points, and a contractor reviewing a practice's wound care claims for any one issue routinely pulls the incident-to documentation while already in the file. If the physician was not in the office suite, or state law did not permit the NP to act alone, the government has two theories rather than one, a billing error layered under a scope-of-practice violation. Extrapolation across the sample, familiar from Skin Substitute Audits: Product Selection, Size, and Frequency Findings and from UPIC Audits of Wound Care Practices: What Triggers Them, can turn a handful of miscoded claims into a demand many times larger than the visits were worth, and the theories described in Skin Substitute FCA Enforcement: The Government's Theories apply just as directly to incident-to claims billed without the supervision they assumed.
A wound care practice billing incident-to without the physician in the office suite is exposed on the billing claim and on the scope-of-practice claim at the same time.
Why Early Legal Counsel Is Critical
When an audit notice or an additional documentation request names your practice's NP billing, the response you send back becomes part of the record the government uses to decide whether this is a billing dispute or something larger. Involving counsel before you respond, rather than after, allows a review of the underlying supervision and scope-of-practice facts while records and staff recollection are still current, and it keeps the practice's own response from expanding the government's theory rather than narrowing it.
How Health Law Alliance Can Help
Health Law Alliance defends wound care practices and the nurse practitioners who treat their patients, drawing on 2,000+ audits overseen and 25+ years of healthcare defense experience. If your practice has received an audit notice or an additional documentation request touching NP billing, our attorneys review the supervision record, the applicable state scope-of-practice framework, and the underlying claims before you respond, through our wound care audit defense practice.
