In simple words: This code is for abnormal test results from checkups during pregnancy. The tests may check the mother's blood, cells, or images of the baby.If something abnormal shows up, a more specific code will be used to explain the problem, not this general code.

This code encompasses abnormal results from antenatal screening tests performed on the mother during pregnancy.These screenings aim to detect potential problems with the pregnancy or the mother's health.The abnormality could be of a biochemical, cytological, ultrasonic, radiological, chromosomal, or genetic nature.This code is not to be used for reimbursement; more specific codes exist within this category (O28.1-O28.9) for detailed billing.

Example 1: A pregnant woman undergoes a blood test (antenatal screening) that reveals an abnormal level of alpha-fetoprotein (AFP), indicating a potential neural tube defect in the fetus. The physician would use a more specific code within the O28 range, not O28., An ultrasound during a routine antenatal screening shows an abnormality in the fetal anatomy, such as a heart defect or other structural issue.Again, this would necessitate a code from O28.1 - O28.9, depending on the finding. O28 is only used for unspecified issues., Genetic testing during prenatal screening identifies a chromosomal abnormality in the fetus, such as trisomy 21 (Down syndrome). A specific code (from O28.1-O28.9) would be used for the specific genetic abnormality found. O28 is not specific enough.

Detailed results of the antenatal screening tests (laboratory reports, ultrasound images, genetic test results, etc.). Documentation should specify the type of abnormality detected.The patient's chart must support use of any more specific code within O28.1-O28.9

** O28 is a non-billable code.It serves as a placeholder and should never be used for reimbursement purposes. Always use a more specific code from the O28.1-O28.9 range to reflect the precise nature of the abnormal antenatal screening findings.