| ICD-10 Code | Description |
| O41.00X0 | Oligohydramnios, unspecified trimester, not applicable or unspecified |
| O41.00X1 | Oligohydramnios, unspecified trimester, fetus 1 |
| O41.00X2 | Oligohydramnios, unspecified trimester, fetus 2 |
| O41.00X3 | Oligohydramnios, unspecified trimester, fetus 3 |
| O41.00X4 | Oligohydramnios, unspecified trimester, fetus 4 |
| O41.00X5 | Oligohydramnios, unspecified trimester, fetus 5 |
| O41.00X9 | Oligohydramnios, unspecified trimester, other fetus |
| O41.01X0 | Oligohydramnios, first trimester, not applicable or unspecified |
| O41.01X1 | Oligohydramnios, first trimester, fetus 1 |
| O41.01X2 | Oligohydramnios, first trimester, fetus 2 |
| O41.01X3 | Oligohydramnios, first trimester, fetus 3 |
| O41.01X4 | Oligohydramnios, first trimester, fetus 4 |
| O41.01X5 | Oligohydramnios, first trimester, fetus 5 |
| O41.01X9 | Oligohydramnios, first trimester, other fetus |
| O41.02X0 | Oligohydramnios, second trimester, not applicable or unspecified |
| O41.02X1 | Oligohydramnios, second trimester, fetus 1 |
| O41.02X2 | Oligohydramnios, second trimester, fetus 2 |
| O41.02X3 | Oligohydramnios, second trimester, fetus 3 |
| O41.02X4 | Oligohydramnios, second trimester, fetus 4 |
| O41.02X5 | Oligohydramnios, second trimester, fetus 5 |
| O41.02X9 | Oligohydramnios, second trimester, other fetus |
| O41.03X0 | Oligohydramnios, third trimester, not applicable or unspecified |
| O41.03X1 | Oligohydramnios, third trimester, fetus 1 |
| O41.03X2 | Oligohydramnios, third trimester, fetus 2 |
| O41.03X3 | Oligohydramnios, third trimester, fetus 3 |
| O41.03X4 | Oligohydramnios, third trimester, fetus 4 |
| O41.03X5 | Oligohydramnios, third trimester, fetus 5 |
| O41.03X9 | Oligohydramnios, third trimester, other fetus |
