O16 - Unspecified maternal hypertension O16 - Unspecified maternal hypertension
O16.1 - Unspecified maternal hypertension, first trimester O16.2 - Unspecified maternal hypertension, second trimester O16.3 - Unspecified maternal hypertension, third trimester O16.9 - Unspecified maternal hypertension, unspecified trimester