ICD-10-CM category
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 | — |
| O10.0 | Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium | — |
| O10.01 | Pre-existing essential hypertension complicating pregnancy | — |
| O10.01 | Pre-existing essential hypertension complicating pregnancy | — |
| O10.1 | Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium | — |
| O10.1 | Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium | — |
| O10.02 | Pre-existing essential hypertension complicating childbirth | ✓ |
| O10.02 | Pre-existing essential hypertension complicating childbirth | ✓ |
| O10.2 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium | — |
| O10.2 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium | — |
| O10.03 | Pre-existing essential hypertension complicating 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 | — |
| O10.3 | 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 | — |
| O10.4 | Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperium | — |
| O10.9 | Unspecified pre-existing 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 | ✓ |
| O10.011 | Pre-existing essential hypertension complicating pregnancy, first trimester | ✓ |
| O10.11 | Pre-existing hypertensive heart disease complicating pregnancy | — |
| O10.11 | Pre-existing hypertensive heart disease complicating pregnancy | — |
| O10.012 | Pre-existing essential hypertension complicating pregnancy, second trimester | ✓ |
| O10.012 | Pre-existing essential hypertension complicating pregnancy, second trimester | ✓ |
| O10.12 | Pre-existing hypertensive heart disease complicating childbirth | ✓ |
| O10.12 | Pre-existing hypertensive heart disease complicating childbirth | ✓ |
| O10.013 | Pre-existing essential hypertension complicating pregnancy, third trimester | ✓ |
| O10.013 | Pre-existing essential hypertension complicating pregnancy, third trimester | ✓ |
| O10.13 | Pre-existing hypertensive heart disease complicating the puerperium | ✓ |
| O10.13 | Pre-existing hypertensive heart disease complicating the puerperium | ✓ |
| O10.019 | Pre-existing essential hypertension complicating pregnancy, unspecified trimester | ✓ |
| O10.019 | Pre-existing essential hypertension complicating pregnancy, unspecified trimester | ✓ |
| O10.21 | Pre-existing hypertensive chronic kidney disease complicating pregnancy | — |
| O10.21 | Pre-existing hypertensive chronic kidney disease complicating pregnancy | — |
| O10.22 | Pre-existing hypertensive chronic kidney disease complicating childbirth | ✓ |
| O10.22 | Pre-existing hypertensive chronic kidney disease complicating childbirth | ✓ |
| O10.23 | Pre-existing hypertensive chronic kidney disease complicating the puerperium | ✓ |
| O10.23 | Pre-existing hypertensive chronic kidney disease complicating the puerperium | ✓ |
| O10.31 | Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy | — |
| O10.31 | Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy | — |
| O10.32 | Pre-existing hypertensive heart and chronic kidney disease complicating childbirth | ✓ |
| O10.32 | Pre-existing hypertensive heart and chronic kidney disease complicating childbirth | ✓ |
| O10.33 | Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium | ✓ |
| O10.33 | Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium | ✓ |
| O10.41 | Pre-existing secondary hypertension complicating pregnancy | — |
| O10.41 | Pre-existing secondary hypertension complicating pregnancy | — |
| O10.42 | Pre-existing secondary hypertension complicating childbirth | ✓ |
| O10.42 | Pre-existing secondary hypertension complicating childbirth | ✓ |
| O10.43 | Pre-existing secondary hypertension complicating the puerperium | ✓ |
| O10.43 | Pre-existing secondary hypertension complicating the puerperium | ✓ |
| O10.91 | Unspecified pre-existing hypertension complicating pregnancy | — |
| O10.91 | Unspecified pre-existing hypertension complicating pregnancy | — |
| O10.92 | Unspecified pre-existing hypertension complicating childbirth | ✓ |
| O10.92 | Unspecified pre-existing hypertension complicating childbirth | ✓ |
| O10.93 | Unspecified pre-existing hypertension complicating the puerperium | ✓ |
| O10.93 | Unspecified pre-existing hypertension complicating the puerperium | ✓ |
| O10.111 | Pre-existing hypertensive heart disease complicating pregnancy, first trimester | ✓ |
| O10.111 | Pre-existing hypertensive heart disease complicating pregnancy, first trimester | ✓ |
| O10.112 | Pre-existing hypertensive heart disease complicating pregnancy, second trimester | ✓ |
| O10.112 | Pre-existing hypertensive heart disease complicating pregnancy, second trimester | ✓ |
| O10.113 | Pre-existing hypertensive heart disease complicating pregnancy, third trimester | ✓ |
| O10.113 | Pre-existing hypertensive heart disease complicating pregnancy, third trimester | ✓ |
| O10.119 | Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester | ✓ |
| O10.119 | Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester | ✓ |
| O10.211 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester | ✓ |
| O10.211 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester | ✓ |
| O10.212 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, second 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 | ✓ |
| O10.213 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester | ✓ |
| O10.219 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified 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 | ✓ |
| O10.311 | 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 | ✓ |
| O10.312 | 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 | ✓ |
| O10.313 | 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 | ✓ |
| O10.319 | Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester | ✓ |
| O10.411 | Pre-existing secondary hypertension complicating pregnancy, first trimester | ✓ |
| O10.411 | Pre-existing secondary hypertension complicating pregnancy, first trimester | ✓ |
| O10.412 | Pre-existing secondary hypertension complicating pregnancy, second trimester | ✓ |
| O10.412 | Pre-existing secondary hypertension complicating pregnancy, second trimester | ✓ |
| O10.413 | Pre-existing secondary hypertension complicating pregnancy, third trimester | ✓ |
| O10.413 | Pre-existing secondary hypertension complicating pregnancy, third trimester | ✓ |
| O10.419 | Pre-existing secondary hypertension complicating pregnancy, unspecified trimester | ✓ |
| O10.419 | Pre-existing secondary hypertension complicating pregnancy, unspecified trimester | ✓ |
| O10.911 | Unspecified pre-existing hypertension complicating pregnancy, first trimester | ✓ |
| O10.911 | Unspecified pre-existing hypertension complicating pregnancy, first trimester | ✓ |
| O10.912 | Unspecified pre-existing hypertension complicating pregnancy, second trimester | ✓ |
| O10.912 | Unspecified pre-existing hypertension complicating pregnancy, second trimester | ✓ |
| O10.913 | Unspecified pre-existing hypertension complicating pregnancy, third trimester | ✓ |
| O10.913 | Unspecified pre-existing hypertension complicating pregnancy, third trimester | ✓ |
| O10.919 | Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester | ✓ |
| O10.919 | Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester | ✓ |
Frequently asked questions
What is ICD-10-CM code O10?
O10 is an ICD-10-CM category covering Pre-existing hypertension complicating pregnancy, childbirth and the puerperium. It contains 96 more specific diagnosis codes, 72 of which are billable.
Is O10 a billable code?
No — O10 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example O10.0 — Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium). 72 of the 96 codes under O10 are billable.
What codes fall under O10?
O10 includes O10.0, O10.0, O10.01, O10.01, O10.1, plus 91 more. See the full list with descriptions and billable status above.
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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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