O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
O11 Pre-existing hypertensive disorder with superimposed proteinuria
O12 Gestational [ pregnancy-induced ] oedema and proteinuria without hypertension
O13 Gestational [ pregnancy-induced ] hypertension without significant proteinuria
O14 Gestational [ pregnancy-induced ] hypertension with significant proteinuria
O15 Eclampsia
O16 Unspecified maternal hypertension