O10.01

Pre-existing essential hypertension complicating pregnancy, first trimester

Pre-existing essential hypertension complicating pregnancy, second trimester

Pre-existing essential hypertension complicating pregnancy, third trimester

Pre-existing essential hypertension complicating pregnancy, unspecified trimester

Pre-existing essential hypertension complicating childbirth

Pre-existing essential hypertension complicating the puerperium