In medicine, Diagnostic codes are used to group and identify diseases, disorders, symptoms, and medical signs, and are used to measure morbidity and mortality.

Procedure codes are numbers or alphanumeric codes used to identify specific health interventions taken by medical professionals.

• International Classification of Procedures in Medicine (ICPM) and International Classification of Health Interventions (ICHI)

• Health Care Procedure Coding System (including Current Procedural Terminology) (used in United States)

• ICD-10 Procedure Coding System (ICD-10-PCS) (used in United States)

• ICD-9-CM Volume 3 (subset of ICD-9-CM) (used in United States)

• Canadian Classification of Health Interventions (CCI) (used in Canada. Replaced CCP.)

• Nursing Interventions Classification (NIC) (used in United States)

• SNOMED (P axis)(english only, translations available but not useful)

• OPS-301 (adaptation of ICPM used in Germany)

• OPCS-4 (used in England)

• Classification des Actes Médicaux (CCAM) (used in France)

Australian Classification of Health Interventions (ACHI)

Pharmaceutical codes are used in medical classification to uniquely identify medication. Examples of coding systems include:

1. Anatomical Therapeutic Chemical Classification System (AT, or ATC/DDD) - administered by World Health Organization

2. National Drug Codes (NDC) - administered by Food and Drug Administration

3. SNOMED - C axis

In medicine, "Topographical codes" (or "topography code") are codes that indicate a specific location in the body.

Examples

Only the first of these is a system dedicated only to topography. The others are more generalized systems that contain topographic axes.

• Nomina Anatomica (updated to Terminologia Anatomica)

• ICD-O

• SNOMED

• MeSH (the 'A' axis)

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