Abnormal findings on antenatal screening of mother
In Other maternal disorders predominantly related to pregnancy (O20-O29), chapter 15: Pregnancy, Childbirth and the Puerperium
8 billable codes under O28: none are a CC or MCC; none map to an HCC.
Advertisements
Instructional notes
Excludes1: not coded here, use a different code
- diagnostic findings classified elsewhere - see Alphabetical Index
Also applies, from Other maternal disorders predominantly related to pregnancy (O20-O29)
These notes sit on O20-O29 and apply to every code under it, including O28.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.
- General Rules for Obstetric Cases (page 63)
- Selection of OB Principal or First-listed Diagnosis (page 64)
- Pre-existing conditions versus conditions due to the pregnancy (page 65)
- Pre-existing hypertension in pregnancy (page 66)
- Fetal Conditions Affecting the Management of the Mother (page 66)
- HIV Infection in Pregnancy, Childbirth and the Puerperium (page 66)
- Diabetes mellitus in pregnancy (page 66)
- Long term use of insulin and oral hypoglycemics (page 67)
All codes under O28
O28 can't be used on a claim. Pick a billable code below; grey headings group them.
- 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
- O28.5Abnormal chromosomal and genetic finding on antenatal screening of mother
- O28.8Other abnormal findings on antenatal screening of mother
- O28.9Unspecified abnormal findings on antenatal screening of mother
O28 MS-DRGs
As the principal diagnosis, all 8 billable codes under O28 group to MS-DRG 817, 818, 819, 831, 832, or 833 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 817 Other Antepartum Diagnoses with O.R. Procedures with MCC
- DRG 818 Other Antepartum Diagnoses with O.R. Procedures with CC
- DRG 819 Other Antepartum Diagnoses with O.R. Procedures without CC/MCC
- DRG 831 Other Antepartum Diagnoses without O.R. Procedures with MCC
- DRG 832 Other Antepartum Diagnoses without O.R. Procedures with CC
- DRG 833 Other Antepartum Diagnoses without O.R. Procedures without CC/MCC
Other codes that refer to O28
Notes on these codes point to O28.
- CH18 Excludes2: abnormal findings on antenatal screening of mother (O28.-)
- R70-R79 Excludes2: abnormal findings on antenatal screening of mother (O28.-)
- R80-R82 Excludes1: abnormal findings on antenatal screening of mother (O28.-)
- R83-R89 Excludes1: abnormal findings on antenatal screening of mother (O28.-)
- R90-R94 Excludes1: abnormal findings on antenatal screening of mother (O28.-)
- Z36 Excludes2: abnormal findings on antenatal screening of mother (O28.-)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Health Problems in Pregnancy
A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.
Read more about health problems in pregnancy on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.