ICD-10-CM > O00-O9A > O20-O29 > O24 > O24.4 > O24.41 O24.41 Gestational diabetes mellitus in pregnancy Non-Billable/Non-Specific Codes O24.410Gestational diabetes mellitus in pregnancy, diet controlledO24.414Gestational diabetes mellitus in pregnancy, insulin controlledO24.415Gestational diabetes mellitus in pregnancy, controlled by oral hypoglycemic drugsO24.419Gestational diabetes mellitus in pregnancy, unspecified control