Final answer:
A new patient for billing purposes is usually defined as someone who has not received any services from the same provider or group practice within a specific time frame, such as 3 years.
Step-by-step explanation:
In healthcare, the definition of a new patient for billing purposes varies depending on the medical practice and insurance policies.
Typically, a patient is considered a new patient if they have not received any services from the same provider or group practice within a specific time frame, such as 3 years.
However, it's important to note that this definition can vary, so it's best to check with the specific healthcare provider or insurance company for their classification of a new patient.