| O11.1 | Pre-existing hypertension with pre-eclampsia, first trimester | BILLABLE CODE |
| O11.2 | Pre-existing hypertension with pre-eclampsia, second trimester | BILLABLE CODE |
| O11.3 | Pre-existing hypertension with pre-eclampsia, third trimester | BILLABLE CODE |
| O11.4 | Pre-existing hypertension with pre-eclampsia, complicating childbirth | BILLABLE CODE |
| O11.5 | Pre-existing hypertension with pre-eclampsia, complicating the puerperium | BILLABLE CODE |
| O11.9 | Pre-existing hypertension with pre-eclampsia, unspecified trimester | BILLABLE CODE |
