O28: Abnormal findings on antenatal screening of mother
Codes under O28 (Abnormal findings on antenatal screening of mother). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| O28.0 | Abnormal hematological finding on antenatal screening of mother | ✓ |
| O28.0 | Abnormal hematological finding on antenatal screening of mother | ✓ |
| O28.1 | Abnormal biochemical finding on antenatal screening of mother | ✓ |
| O28.1 | Abnormal biochemical finding on antenatal screening of mother | ✓ |
| O28.2 | Abnormal cytological finding on antenatal screening of mother | ✓ |
| O28.2 | Abnormal cytological finding on antenatal screening of mother | ✓ |
| O28.3 | Abnormal ultrasonic finding on antenatal screening of mother | ✓ |
| O28.3 | Abnormal ultrasonic finding on antenatal screening of mother | ✓ |
| O28.4 | Abnormal radiological finding on antenatal screening of mother | ✓ |
| O28.4 | Abnormal radiological finding on antenatal screening of mother | ✓ |
| O28.5 | Abnormal chromosomal and genetic finding on antenatal screening of mother | ✓ |
| O28.5 | Abnormal chromosomal and genetic finding on antenatal screening of mother | ✓ |
| O28.8 | Other abnormal findings on antenatal screening of mother | ✓ |
| O28.8 | Other abnormal findings on antenatal screening of mother | ✓ |
| O28.9 | Unspecified abnormal findings on antenatal screening of mother | ✓ |
| O28.9 | Unspecified abnormal findings on antenatal screening of mother | ✓ |
Frequently asked questions
What is ICD-10-CM code O28?
O28 is an ICD-10-CM category covering Abnormal findings on antenatal screening of mother. It contains 16 more specific diagnosis codes, 16 of which are billable.
Is O28 a billable code?
No — O28 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example O28.0 — Abnormal hematological finding on antenatal screening of mother). 16 of the 16 codes under O28 are billable.
What codes fall under O28?
O28 includes O28.0, O28.0, O28.1, O28.1, O28.2, plus 11 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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