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