O10  Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

O11  Pre-existing hypertension with pre-eclampsia

O12  Gestational [pregnancy-induced] edema and proteinuria without hypertension

O13  Gestational [pregnancy-induced] hypertension without significant proteinuria

O14.0

Mild to moderate pre-eclampsia

O14.1

Severe pre-eclampsia

O14.2

HELLP syndrome

O14.9 Unspecified pre-eclampsia

O15  Eclampsia

O16  Unspecified maternal hypertension