O11
Header — not billablePre-existing hypertension with pre-eclampsia
The ICD-10 code for pre-existing hypertension with pre-eclampsia is O11.
O11 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.
Clinical notes
Includes
Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.
- conditions in O10 complicated by pre-eclampsia
- pre-eclampsia superimposed pre-existing hypertension
Use additional code
This code represents an underlying condition. When a related manifestation is also present, coding convention calls for an additional code to be listed after this one.
- code from O10 to identify the type of hypertension
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •If the associated manifestation or related condition noted above is also documented, an additional code should be reported alongside this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under O11
- O11.1Pre-existing hypertension with pre-eclampsia, first trimester
- O11.2Pre-existing hypertension with pre-eclampsia, second trimester
- O11.3Pre-existing hypertension with pre-eclampsia, third trimester
- O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirth
- O11.5Pre-existing hypertension with pre-eclampsia, complicating the puerperium
- O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimester
Related codes in this category
- O10Pre-existing hypertension complicating pregnancy, childbirth and the puerperiumnon-billable header
- O12Gestational [pregnancy-induced] edema and proteinuria without hypertensionnon-billable header
- O13Gestational [pregnancy-induced] hypertension without significant proteinurianon-billable header
- O14Pre-eclampsianon-billable header
- O15Eclampsianon-billable header
- O16Unspecified maternal hypertensionnon-billable header
- O11Pre-existing hypertension with pre-eclampsianon-billable header