O10: Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

Codes under O10 (Pre-existing hypertension complicating pregnancy, childbirth and the puerperium). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
O10.0	Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium	—
O10.01	Pre-existing essential hypertension complicating pregnancy	—
O10.1	Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium	—
O10.02	Pre-existing essential hypertension complicating childbirth	✓
O10.2	Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium	—
O10.03	Pre-existing essential hypertension complicating the puerperium	✓
O10.3	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, childbirth and the puerperium	—
O10.4	Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperium	—
O10.9	Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium	—
O10.011	Pre-existing essential hypertension complicating pregnancy, first trimester	✓
O10.11	Pre-existing hypertensive heart disease complicating pregnancy	—
O10.012	Pre-existing essential hypertension complicating pregnancy, second trimester	✓
O10.12	Pre-existing hypertensive heart disease complicating childbirth	✓
O10.013	Pre-existing essential hypertension complicating pregnancy, third trimester	✓
O10.13	Pre-existing hypertensive heart disease complicating the puerperium	✓
O10.019	Pre-existing essential hypertension complicating pregnancy, unspecified trimester	✓
O10.21	Pre-existing hypertensive chronic kidney disease complicating pregnancy	—
O10.22	Pre-existing hypertensive chronic kidney disease complicating childbirth	✓
O10.23	Pre-existing hypertensive chronic kidney disease complicating the puerperium	✓
O10.31	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy	—
O10.32	Pre-existing hypertensive heart and chronic kidney disease complicating childbirth	✓
O10.33	Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium	✓
O10.41	Pre-existing secondary hypertension complicating pregnancy	—
O10.42	Pre-existing secondary hypertension complicating childbirth	✓
O10.43	Pre-existing secondary hypertension complicating the puerperium	✓
O10.91	Unspecified pre-existing hypertension complicating pregnancy	—
O10.92	Unspecified pre-existing hypertension complicating childbirth	✓
O10.93	Unspecified pre-existing hypertension complicating the puerperium	✓
O10.111	Pre-existing hypertensive heart disease complicating pregnancy, first trimester	✓
O10.112	Pre-existing hypertensive heart disease complicating pregnancy, second trimester	✓
O10.113	Pre-existing hypertensive heart disease complicating pregnancy, third trimester	✓
O10.119	Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester	✓
O10.211	Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester	✓
O10.212	Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester	✓
O10.213	Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester	✓
O10.219	Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester	✓
O10.311	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, first trimester	✓
O10.312	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, second trimester	✓
O10.313	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, third trimester	✓
O10.319	Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester	✓
O10.411	Pre-existing secondary hypertension complicating pregnancy, first trimester	✓
O10.412	Pre-existing secondary hypertension complicating pregnancy, second trimester	✓
O10.413	Pre-existing secondary hypertension complicating pregnancy, third trimester	✓
O10.419	Pre-existing secondary hypertension complicating pregnancy, unspecified trimester	✓
O10.911	Unspecified pre-existing hypertension complicating pregnancy, first trimester	✓
O10.912	Unspecified pre-existing hypertension complicating pregnancy, second trimester	✓
O10.913	Unspecified pre-existing hypertension complicating pregnancy, third trimester	✓
O10.919	Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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