| O41.00X0 | Oligohydramnios, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O41.00X1 | Oligohydramnios, unspecified trimester, fetus 1 | BILLABLE CODE |
| O41.00X2 | Oligohydramnios, unspecified trimester, fetus 2 | BILLABLE CODE |
| O41.00X3 | Oligohydramnios, unspecified trimester, fetus 3 | BILLABLE CODE |
| O41.00X4 | Oligohydramnios, unspecified trimester, fetus 4 | BILLABLE CODE |
| O41.00X5 | Oligohydramnios, unspecified trimester, fetus 5 | BILLABLE CODE |
| O41.00X9 | Oligohydramnios, unspecified trimester, other fetus | BILLABLE CODE |
