O11 – Pre-existing hypertension with pre-eclampsia
ICD-10-CM 2027 diagnosis code · Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
ICD-10-CM code
O11
- Code
O11(claims format:O11)- Description
- Pre-existing hypertension with pre-eclampsia
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 15. Pregnancy, childbirth and the puerperium (O00-O9A)
- Block
- O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
Billable codes under O11
O11 is a header code and cannot be used on claims. Choose the most specific code:
- O11.1 – Pre-existing hypertension with pre-eclampsia, first trimesterBillable
- O11.2 – Pre-existing hypertension with pre-eclampsia, second trimesterBillable
- O11.3 – Pre-existing hypertension with pre-eclampsia, third trimesterBillable
- O11.4 – Pre-existing hypertension with pre-eclampsia, complicating childbirthBillable
- O11.5 – Pre-existing hypertension with pre-eclampsia, complicating the puerperiumBillable
- O11.9 – Pre-existing hypertension with pre-eclampsia, unspecified trimesterBillable
Notes for O11
Includes:
- conditions in O10 complicated by pre-eclampsia
- pre-eclampsia superimposed pre-existing hypertension
Use additional code:
- code from O10 to identify the type of hypertension
Frequently asked questions
What is ICD-10 code O11?
O11 is the ICD-10-CM code for pre-existing hypertension with pre-eclampsia, in the block O10-O16 (Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium).
Is O11 a billable code?
No. O11 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.