1. Home
  2. ICD-10-CM Codes
  3. O00-O9A
  4. O20-O29
  5. O28
  6. 2025 ICD-10-CM Code O28
Version 2025
Non-Billable Code

2025 ICD-10-CM Diagnosis Code O28

Abnormal findings on antenatal screening of mother

ICD-10-CM Code:
O28
ICD-10 Code for:
Abnormal findings on antenatal screening of mother
Is Billable?
Not Valid for Submission
Code Navigator:

O28 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of abnormal findings on antenatal screening of mother. The code is not specific and is NOT valid for the year 2025 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Abnormal findings on antenatal screening of mother

Non-specific codes like O28 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for abnormal findings on antenatal screening of mother:

  • Use O28.0 for Abnormal hematological finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.1 for Abnormal biochemical finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.2 for Abnormal cytological finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.3 for Abnormal ultrasonic finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.4 for Abnormal radiological finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.5 for Abnormal chromosomal and genetic finding on antenatal screening of mother - BILLABLE CODE

  • Use O28.8 for Other abnormal findings on antenatal screening of mother - BILLABLE CODE

  • Use O28.9 for Unspecified abnormal findings on antenatal screening of mother - BILLABLE CODE

Code Classification

  • Pregnancy, childbirth and the puerperium
    (O00-O9A)
    • Other maternal disorders predominantly related to pregnancy
      (O20-O29)
      • Abnormal findings on antenatal screening of mother
        (O28)

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • diagnostic findings classified elsewhere - see Alphabetical Index

Patient Education


Health Problems in Pregnancy

Every pregnancy has some risk of problems, but there are certain conditions and health issues that can raise that risk, such as:

  • A health condition you had before you got pregnant
  • A health condition you develop during pregnancy
  • A pregnancy with more than one baby
  • A health problem that happened during a previous pregnancy and could happen again
  • Substance use during pregnancy
  • Being over age 35

Any of these can affect your health, the health of your baby, or both.

If you have a chronic condition, you should talk to your health care provider about how to minimize your risk before you get pregnant. Once you are pregnant, you may need a health care team to monitor your pregnancy. Some common conditions that can complicate a pregnancy include:

  • High blood pressure
  • Kidney problems
  • Autoimmune diseases
  • Obesity
  • HIV
  • Cancer
  • Infections

Other conditions that may make pregnancy risky can develop during pregnancy - for example, gestational diabetes and Rh incompatibility. Good prenatal care can help detect and treat them.

Some symptoms, such as nausea, back pain, and fatigue, are common during pregnancy. Sometimes it is hard to know what is normal. Call your health care provider if something is bothering or worrying you.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.