A patient is considered “new” when they have not received any face-to-face professional services from a provider, or from another provider of the same specialty within the same group practice, in the previous three years. That three-year window is the core rule, but several nuances around specialties, group practices, and provider types determine how it applies in real-world billing.
The Three-Year Rule
The standard definition comes from CPT guidelines and is used by Medicare and most commercial payers: a new patient is someone who has not received any professional service from the physician or qualified healthcare professional within the past three years. “Professional services” here means evaluation and management visits or other face-to-face encounters like surgical procedures. The clock starts from the date of the last such service.
If a patient was seen on March 10, 2022, they would become eligible for new patient status on March 10, 2025, assuming no face-to-face services occurred in between. The three-year period is measured from the exact date, not the calendar year.
Why New vs. Established Matters Financially
New patient visits reimburse at higher rates because they require more time and effort. The provider is building a history, reviewing outside records, and making initial assessments from scratch. Under the 2024 Medicare Physician Fee Schedule, the gap is meaningful at every complexity level. A straightforward new patient office visit pays $72.23, while the equivalent established patient visit pays $56.59. At the highest complexity level, a new patient visit pays $220.36 compared to $180.42 for an established patient. That’s roughly a 20 to 30 percent difference depending on the visit level.
These differences make accurate classification important. Billing a visit as new when the patient is actually established (or vice versa) can trigger audits, denials, and repayment demands.
How Specialties Affect Patient Status in Group Practices
The rule extends beyond a single provider. If a patient has seen any provider of the “exact same specialty and subspecialty” within the same group practice in the past three years, that patient is established for all providers of that specialty in the group. This means you can’t simply schedule a patient with a different doctor in the same department and bill as new.
However, if the patient sees a provider in a genuinely different specialty or subspecialty within the same group, they can be classified as new to that specialty. For example, Medicare considers gynecologic oncology a distinct subspecialty from general obstetrics and gynecology. A patient established with one could be new to the other, even if both providers work in the same practice.
This is where things get tricky: different payers may classify specialties and subspecialties differently. The distinction typically depends on how the provider was credentialed with that payer, not on how the practice markets itself. What counts as a separate subspecialty for Medicare may not be recognized the same way by a commercial insurer.
Nurse Practitioners and Physician Assistants
CPT guidelines treat physician assistants and nurse practitioners as the same specialty as the supervising physician they work with. If a patient has seen a nurse practitioner in your group within the past three years, that patient is established when they come to see the physician in that same specialty for the first time. The prior visit with the mid-level provider counts.
This catches some practices off guard. A physician meeting a patient for the first time may assume it’s a new patient encounter, but if their NP or PA previously saw that patient, the visit should be billed as established.
Diagnostic Tests Don’t Count
One important exception: if a provider only interpreted a diagnostic test for a patient (reading an X-ray, EKG, or lab result) without any face-to-face encounter, that does not make the patient established. The key phrase is “professional services,” which requires direct, in-person interaction. A radiologist who read your imaging two years ago but never met you in person has not established a patient relationship with you under these rules.
This distinction matters for specialists who frequently interpret studies for patients they never see face-to-face. If that patient later comes in for an office visit, they would be classified as new.
Common Scenarios That Cause Confusion
A few situations regularly trip up billing staff:
- Returning after a long gap. A patient who hasn’t been seen in 3+ years is new again, even if they have an extensive history in your system. Their old records still exist, but for billing purposes, the visit is coded as new.
- Transferring within a group. A patient switching from one cardiologist to another cardiologist in the same group is established, because the specialty hasn’t changed. A patient going from a cardiologist to an endocrinologist in the same group is new to endocrinology.
- Hospital encounters. If a hospitalist in a multi-specialty group saw the patient during an inpatient stay, that face-to-face service counts. The patient would be established to that specialty in the group going forward.
- Telehealth visits. Virtual visits that qualify as face-to-face encounters under CPT guidelines count the same as in-person visits for determining patient status.
How Practices Verify Patient Status
Most practices check patient status by searching their scheduling and billing systems for any prior face-to-face encounter with a same-specialty provider within the past three years. The search should include all providers in the group who share the same specialty designation, including nurse practitioners and physician assistants aligned with that specialty.
For patients transferring from outside the group, the determination is simpler. If they’ve never been seen by anyone in your group practice, they’re new regardless of how many other doctors they’ve visited elsewhere. The three-year rule applies within a specific practice or group, not across the healthcare system as a whole.