O11: Pre-existing hypertension with pre-eclampsia includes conditions in Ol0 complicated by pre-eclampsia pre-eclampsia superimposed pre-existing hypertension useAdditionalCode code from O10 to identify the type of hypertension |
| O11.1: Pre-existing hypertension with pre-eclampsia, first trimester |
| O11.2: Pre-existing hypertension with pre-eclampsia, second trimester |
| O11.3: Pre-existing hypertension with pre-eclampsia, third trimester |
| O11.4: Pre-existing hypertension with pre-eclampsia, complicating childbirth |
| O11.5: Pre-existing hypertension with pre-eclampsia, complicating the puerperium |
| O11.9: Pre-existing hypertension with pre-eclampsia, unspecified trimester |