O28.1 – Abnormal biochemical finding on antenatal screening of mother

ICD-10-CM 2027 diagnosis code · Other maternal disorders predominantly related to pregnancy

Billable code

ICD-10-CM code O28.1

Code: O28.1 (claims format: O281)
Description: Abnormal biochemical finding on antenatal screening of mother
Short description: Abnormal biochemical finding on antenat screening of mother
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O20-O29 Other maternal disorders predominantly related to pregnancy
Parent codes: O28

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O28 – Abnormal findings on antenatal screening of mother

Excludes1 (not coded here):

diagnostic findings classified elsewhere - see Alphabetical Index

Block O20-O29

Excludes2 (not included here):

maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

Index terms for O28.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O28

Frequently asked questions

What is ICD-10 code O28.1?

O28.1 is the ICD-10-CM code for abnormal biochemical finding on antenatal screening of mother, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O28.1 a billable code?

Yes. O28.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O28.1 belong to?

It belongs to category O28 – Abnormal findings on antenatal screening of mother.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.