It starts with a patient who sees a physician. The patient gives the office their insurance or Medicare card and a new medical billing form is generated. No matter what procedures are rendered to the patient, it will be documented in the form of numbers called CPT codes, on the medical billing form. If the patient has any testing done such as a blood or urine sample, basic evaluation or even a patient history interview, all of this including if the patient is a first time visit or not will be documented on the medical billing form. If there is a reason for the patient not feeling well such as …