This document is part of the National Correct Coding Initiative Policy Manual for Medicaid Services released by the American Medical Association (AMA) in 2021. It mainly introduces the CPT codes for medicine evaluation and management services, including therapeutic or diagnostic infusions/injections and immunizations, psychiatric services, biofeedback, dialysis, gastroenterology, ophthalmology, otorhinolaryngologic services, cardiovascular services, pulmonary services, allergy testing and immunotherapy, neurology and neuromuscular procedures, central nervous system (CNS) assessments/tests, chemotherapy administration, etc.