O28
ICD-10Non-billable categoryAbnormal findings on antenatal screening of mother
Official ICD-10-CM descriptor (FY2026)
Abnormal findings on antenatal screening of mother
O28 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- diagnostic findings classified elsewhere - see Alphabetical Index
More specific codes under O28
- O28.0Abnormal hematolog finding on antenatal screening of mother
- O28.1Abnormal biochemical finding on antenat screening of mother
- O28.2Abnormal cytolog finding on antenatal screening of mother
- O28.3Abnormal ultrasonic finding on antenatal screening of mother
- O28.4Abnormal radiolog finding on antenatal screening of mother
- O28.5Abn chromsoml and genetic find on antenat screen of mother
- O28.8Other abnormal findings on antenatal screening of mother
- O28.9Unsp abnormal findings on antenatal screening of mother
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.