Diagnostic codes Are used to determine diseases, disorders, and symptoms Can be used to measure morbidity and mortality Examples: ICD-9-CM, ICD-10[1] Procedural codes They are numbers or alphanumeric codes used to identify specific health interventions taken by medical professionals. Examples: CPT, HCPCS, ICPM, ICHI Pharmaceutical codes Are used to identify medications Examples: ATC, NDC Topographical codes Are codes that indicate a specific location in the body Examples :ICD-O, SNOMED