This document is a lecture on Current Procedural Terminology (CPT) and Health Care Procedure Coding System (HCPCS) coding systems given by Raymond R. Arons at Baruch College/Mount Sinai School of Medicine. It provides a history of CPT, how it is organized and updated, examples of codes for evaluation and management, anesthesia, surgery, radiology, pathology, and medicine. It also includes New York State Medicaid fee schedules for physician services.