Pre-existing hypertension with pre-eclampsia - O11

 Category Includes

• conditions in Ol0 complicated by pre-eclampsia
• pre-eclampsia superimposed pre-existing hypertension

 Use Additional

• code from O10 to identify the type of hypertension

 Codes

• 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