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