O28.5

✓ Billable

Abnormal chromosomal and genetic finding on antenatal screening of mother

Pregnancy, childbirth and the puerperium (O00-O9A)

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❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

O28

• diagnostic findings classified elsewhere - see Alphabetical Index

Clinical Description

ICD-10-CM code O28.5 represents abnormal chromosomal and genetic finding on antenatal screening of mother. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that O28.5 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code O28.5?

ICD-10-CM code O28.5 is "Abnormal chromosomal and genetic finding on antenatal screening of mother". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O28.5 a billable ICD-10 code?

Yes, O28.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with O28.5?

O28.5 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Related Codes in O28

Other codes in the same category that may be relevant for differential coding:

O28.0Abnormal hematological finding on antenatal screening of mother O28.1Abnormal biochemical finding on antenatal screening of mother O28.2Abnormal cytological finding on antenatal screening of mother O28.3Abnormal ultrasonic finding on antenatal screening of mother O28.4Abnormal radiological finding on antenatal screening of mother O28.8Other abnormal findings on antenatal screening of mother O28.9Unspecified abnormal findings on antenatal screening of mother

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Code Information

CodeO28.5

BillableYes

ParentO28

CategoryPregnancy, childbirth and the puerperium (O00-O9A)

Excludes11 rule(s)

Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)