O11 — ICD-10-CM Diagnosis Codes

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