| O36.1120 | Maternal care for Anti-A sensitization, second trimester, not applicable or unspecified | BILLABLE CODE |
| O36.1121 | Maternal care for Anti-A sensitization, second trimester, fetus 1 | BILLABLE CODE |
| O36.1122 | Maternal care for Anti-A sensitization, second trimester, fetus 2 | BILLABLE CODE |
| O36.1123 | Maternal care for Anti-A sensitization, second trimester, fetus 3 | BILLABLE CODE |
| O36.1124 | Maternal care for Anti-A sensitization, second trimester, fetus 4 | BILLABLE CODE |
| O36.1125 | Maternal care for Anti-A sensitization, second trimester, fetus 5 | BILLABLE CODE |
| O36.1129 | Maternal care for Anti-A sensitization, second trimester, other fetus | BILLABLE CODE |
