How Many Classifications of Diseases Are There?

The current International Statistical Classification for Diseases and Related Health Problems is ICD-10, which contains 22 classifications that break down into hierarchies containing 14,400 diagnoses. These diagnoses are assigned codes that can be expanded to over 16,000 diagnoses via sub-classifications.

ICD is a system utilized by physicians, nurses and other health professionals to classify diseases for vital records and death certificates. Researchers use ICD-10 to analyze the general health of entire populations. Policymakers and insurers use it when making decisions regarding reimbursement and resource allocation.

ICD-10 was endorsed by the 43rd World Health Assembly in May 1990, and it came into use in 1994. It has been translated into 43 languages, and 117 countries use it to report mortality data. The release date for ICD-11 is 2017.