Definition: "Nonbillable" is a medical terminology that refers to a service or procedure that is not billed for, as it does not generate any revenue. It's used in healthcare settings to describe services that are not considered part of the patient's overall health care plan. For example, if a doctor performs an MRI scan on a patient, but there is no charge for this service, it would be considered nonbillable. Similarly, if a patient has surgery and pays for their own anesthesia, they