O28.0 Abnormal hematological finding on antenatal screening of mother

Billable ICD-10-CM code, FY2026.

Applies from O28 Abnormal findings on antenatal screening of mother

Excludes1 (never code together)

• diagnostic findings classified elsewhere - see Alphabetical Index

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 796.5 Abnormal finding on antenatal screening (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O28.0

Back-references to O28

• Type 2 Excludes: Z36 Encounter for antenatal screening of mother ("abnormal findings on antenatal screening of mother (O28.-)")

Diagnosis Index entries for O28.0

• Findings, abnormal, inconclusive, without diagnosis › antenatal screening of mother › hematological
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › abnormal, abnormality › findings on antenatal screening of mother › hematological

Nearby codes

• O28 Abnormal findings on antenatal screening of mother
• O28.0 Abnormal hematological finding on antenatal screening of mother (this code)
• O28.1 Abnormal biochemical 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
• O28.4 Abnormal radiological finding on antenatal screening of mother
• O28.5 Abnormal chromosomal and genetic finding on antenatal screening of mother