| O99.41 | Diseases of the circulatory system complicating pregnancy | NON-BILLABLE CODE |
| O99.411 | Diseases of the circulatory system complicating pregnancy, first trimester | BILLABLE CODE |
| O99.412 | Diseases of the circulatory system complicating pregnancy, second trimester | BILLABLE CODE |
| O99.413 | Diseases of the circulatory system complicating pregnancy, third trimester | BILLABLE CODE |
| O99.419 | Diseases of the circulatory system complicating pregnancy, unspecified trimester | BILLABLE CODE |
| O99.42 | Diseases of the circulatory system complicating childbirth | BILLABLE CODE |
| O99.43 | Diseases of the circulatory system complicating the puerperium | BILLABLE CODE |
