Final answer:
The E/M codes used for a routine annual doctor examination are called preventive medicine services codes. These codes are 99385 to 99387 for new patients and 99395 to 99397 for established patients, depending on their age.
Step-by-step explanation:
The type of E/M (Evaluation and Management) codes used for a routine annual doctor examination are known as preventive medicine services codes. These codes are part of the Current Procedural Terminology (CPT) code set that's used to bill outpatient and office procedures. For adult patients, these visits are often coded as 99385 to 99387 for a new patient and 99395 to 99397 for an established patient, varying based on the age of the patient. When coding these services, it's important for healthcare providers to document the comprehensive nature of the preventive service which may include a comprehensive history and physical examination, and may also involve counseling or risk factor interventions.