A review of provider schedules and billing logs reveals therapists regularly billing for more one-on-one time than physically exists in a workday — for example, billing 12 hours of direct therapeutic CPT codes in an 8-hour shift. This "impossible day" pattern is often the result of double-booking Medicare patients while billing time-based codes as if each session was conducted individually and sequentially.

Medicare strictly mandates the 8-Minute Rule for time-based codes such as therapeutic exercise, manual therapy, and neuromuscular re-education. To bill a single billable unit, the therapist must provide continuous, direct, one-on-one skilled service for at least 8 minutes. Double-booking two Medicare patients simultaneously and billing separate time-based codes for both constitutes fraudulent upcoding with significant civil and criminal exposure.

The practice's profit margins appear exceptional because operations rely heavily on unlicensed rehab aides, technicians, or students to perform the bulk of patient treatments — while the licensed PT handles evaluations and administrative tasks. The billing, however, presents these services as if they were performed by a licensed provider. A specific red flag: students treating patients independently in a separate room while the supervising PT is simultaneously treating another patient elsewhere in the clinic.

Under Medicare rules, services performed by physical therapy aides or technicians are never covered, even if performed under the direct, line-of-sight supervision of a licensed Physical Therapist. Only services provided by a PT — or by a properly supervised Physical Therapist Assistant (PTA) under specific supervision protocols — are billable to Medicare. Students occupy a narrow middle ground: Medicare Part B does permit billing for services involving a student, but the licensed PT must be physically present in the same room for the entire session, actively directing the service and taking full clinical responsibility — while not simultaneously treating any other patient. The moment the PT steps out or treats another patient concurrently, the student session becomes non-billable.

Billing data shows an unusually high frequency of Modifier 59 or the KX Modifier attached to claims — particularly when these modifiers appear to be applied automatically by billing software rather than through individual clinical review. A related red flag: the complete absence of the more specific X{EPSU} modifiers (XE, XS, XP, XU), which CMS introduced specifically to replace the broad, catch-all use of Modifier 59. High Modifier 59 rates combined with zero X modifier usage signals outdated, lazy coding practices to any sophisticated buyer audit team.

Modifier 59 indicates a "distinct procedural service," allowing providers to bypass NCCI edits that would otherwise bundle services together. The KX Modifier attests that treatment beyond Medicare's targeted therapy threshold is medically necessary. Both require individualized claim-by-claim documentation. Critically, CMS created the X{EPSU} modifiers — XE (separate encounter), XS (separate structure/body part), XP (separate practitioner), XU (unusual non-overlapping service) — to replace Modifier 59's overly broad use. Modern, compliant billing uses these granular modifiers; a practice still blanketing claims with Modifier 59 alone has not kept pace with CMS guidance and is a prime NCCI audit target.

Daily treatment notes appear identical visit after visit — a telltale sign of copy-paste or "cloning" — failing to document patient progress, functional changes, or the clinical reasoning behind treatment modifications. Simultaneously, patient charts consistently lack a signed Plan of Care (POC) from the referring physician, or the POC was signed outside of required timeframes.

Medicare requires a Plan of Care to be certified — signed and dated — by a physician or qualified non-physician practitioner. Furthermore, every daily note must explicitly document that the interventions required the skills of a licensed therapist. The Medicare standard is clear: "if it wasn't documented, it wasn't done." Cloned notes fail to demonstrate medical necessity or skilled care.

Recertifications must be physically signed and dated by the physician every 90 days or upon any significant change in the plan. There is no exception for recertifications — a missed signature is an automatic denial.

The practice has questionable financial relationships with referral sources. Common examples include: paying a referring orthopedic surgeon an inflated fee to serve as a nominal "Medical Director," renting office space from a referring physician group at above or below fair market value, or structuring the seller's post-close earn-out compensation based on their future referral volume to the clinic after the sale closes.

The Anti-Kickback Statute (AKS) is a federal criminal law prohibiting the exchange of anything of value — directly or indirectly — to induce or reward referrals for federal healthcare program patients. The Stark Law is a strict-liability civil statute prohibiting physician self-referral to entities with which they have a financial relationship. Under Stark, intent is irrelevant — the structure of the relationship is all that matters.

During financial due diligence, the buyer's accountants compare the practice's billing system to their bank deposits. They notice that while Medicare is paying its 80% share of the claims, the clinic is rarely, if ever, collecting the remaining 20% patient copay/coinsurance.

Practice owners often waive copays as a "professional courtesy" to keep patient volume high or prevent patients from self-discharging early. However, under the Anti-Kickback Statute and the Civil Monetary Penalties Law, routinely waiving Medicare patient responsibility is considered offering illegal remuneration — a kickback — to induce the patient to receive federally funded services. Waivers are only legal if there is a documented, individualized assessment of financial hardship.

Sellers often place patients on RTM platforms (CPT 98975, 98977, etc.) and set billing on "auto-pilot" without ensuring the clinical monitoring actually occurred. When buyers request software audit logs, the timestamps and data collection records frequently fail to match the billing ledger — exposing the revenue stream as unsupported and potentially fraudulent.

RTM billing requires strict adherence to data collection minimums — for example, 16 days of data per 30-day period — and documented interactive communication between the clinician and patient. CMS requires that the clinical monitoring actually occur and be verifiable in software logs. Billing for RTM services that were never delivered or cannot be documented constitutes a false claim under the False Claims Act.