INS and diabetes mellitus: A subject was classified as diabetic if any of the following criteria were met: two medical visits with ICD-9-CM code 250.xx within 1 year (Medical Service Plan); hospital admission with a diabetes-related code (ICD-9-CM 250.xx or ICD-10-CA E10*–E14*); prescription of at least two oral hypoglycemic agents or insulin within 1 year.