How Many Mental Disorders Are There?: The DSM & Diagnosable Mental Health Disorders

Almost 50 percent of Americans (46.4 percent to be exact) will have a diagnosable mental illness in their lifetimes, based on the previous edition, the DSM-IV. And the new manual will likely make it even “easier” to get a diagnosis. – Robin S. Rosenberg

• The DSM-I (1952) had 106 disorders.
• The DSM-III (1980) had 265.
• The DSM-IV had 297.
• The number of categories in the DSM-5 (2013) was said to have increased approximately 10% and so has roughly 330.