ICD-10-CM category
O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
O10 is a category, not a billable code. Report one of the 36 complete codes below.
Codes in O10
- O10.011Pre-existing essential hypertension complicating pregnancy, first trimester
- O10.012Pre-existing essential hypertension complicating pregnancy, second trimester
- O10.013Pre-existing essential hypertension complicating pregnancy, third trimester
- O10.019Pre-existing essential hypertension complicating pregnancy, unspecified trimester
- O10.02Pre-existing essential hypertension complicating childbirth
- O10.03Pre-existing essential hypertension complicating the puerperium
- O10.111Pre-existing hypertensive heart disease complicating pregnancy, first trimester
- O10.112Pre-existing hypertensive heart disease complicating pregnancy, second trimester
- O10.113Pre-existing hypertensive heart disease complicating pregnancy, third trimester
- O10.119Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester
- O10.12Pre-existing hypertensive heart disease complicating childbirth
- O10.13Pre-existing hypertensive heart disease complicating the puerperium
- O10.211Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester
- O10.212Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester
- O10.213Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester
- O10.219Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester
- O10.22Pre-existing hypertensive chronic kidney disease complicating childbirth
- O10.23Pre-existing hypertensive chronic kidney disease complicating the puerperium
- O10.311Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, first trimester
- O10.312Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, second trimester
- O10.313Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, third trimester
- O10.319Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester
- O10.32Pre-existing hypertensive heart and chronic kidney disease complicating childbirth
- O10.33Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium
- O10.411Pre-existing secondary hypertension complicating pregnancy, first trimester
- O10.412Pre-existing secondary hypertension complicating pregnancy, second trimester
- O10.413Pre-existing secondary hypertension complicating pregnancy, third trimester
- O10.419Pre-existing secondary hypertension complicating pregnancy, unspecified trimester
- O10.42Pre-existing secondary hypertension complicating childbirth
- O10.43Pre-existing secondary hypertension complicating the puerperium
- O10.911Unspecified pre-existing hypertension complicating pregnancy, first trimester
- O10.912Unspecified pre-existing hypertension complicating pregnancy, second trimester
- O10.913Unspecified pre-existing hypertension complicating pregnancy, third trimester
- O10.919Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester
- O10.92Unspecified pre-existing hypertension complicating childbirth
- O10.93Unspecified pre-existing hypertension complicating the puerperium
Outside the US? O10 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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