| O09.51 | Supervision of elderly primigravida | NON-BILLABLE CODE |
| O09.511 | Supervision of elderly primigravida, first trimester | BILLABLE CODE |
| O09.512 | Supervision of elderly primigravida, second trimester | BILLABLE CODE |
| O09.513 | Supervision of elderly primigravida, third trimester | BILLABLE CODE |
| O09.519 | Supervision of elderly primigravida, unspecified trimester | BILLABLE CODE |
| O09.52 | Supervision of elderly multigravida | NON-BILLABLE CODE |
| O09.521 | Supervision of elderly multigravida, first trimester | BILLABLE CODE |
| O09.522 | Supervision of elderly multigravida, second trimester | BILLABLE CODE |
| O09.523 | Supervision of elderly multigravida, third trimester | BILLABLE CODE |
| O09.529 | Supervision of elderly multigravida, unspecified trimester | BILLABLE CODE |
