what are the major differences between cpt and hcpcs codes
1 Current Procedural Terminology (CPTÂ®): These numeric codes are used for outpatient procedures and procedures performed in physicians' offices. ( 2 3). 3  Healthcare Common Procedure Coding System (HCPCS): These codes are used for Medicare or Medicaid procedures. 4  The HCPCS has two levels: CPT (Level I) and HCPCS (Level II).