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

Commonly used diagnosis coding systems

• ICD-9-CM (volumes 1 and 2 only. Volume 3 contains Procedure codes)
• ICD-10
• ICPC-2 (Also includes reasons for encounter (RFE), Procedure codes and process of care)
• NANDA
• Diagnostic and Statistical Manual of Mental Disorders (psychiatric disorders only)
• Mendelian Inheritance in Man (genetic diseases only)
• SNOMED (D axis)

See also

• Diagnosis-related group
• Medical classification

Diagnosis classification