| O28 | Abnormal findings on antenatal screening of mother | NON-BILLABLE CODE |
| O28.1 | Abnormal biochemical finding on antenatal screening of mother | BILLABLE CODE |
| O28.2 | Abnormal cytological finding on antenatal screening of mother | BILLABLE CODE |
| O28.3 | Abnormal ultrasonic finding on antenatal screening of mother | BILLABLE CODE |
| O28.4 | Abnormal radiological finding on antenatal screening of mother | BILLABLE CODE |
| O28.5 | Abnormal chromosomal and genetic finding on antenatal screening of mother | BILLABLE CODE |
| O28.8 | Other abnormal findings on antenatal screening of mother | BILLABLE CODE |
| O28.9 | Unspecified abnormal findings on antenatal screening of mother | BILLABLE CODE |
