Fetal anemia and thrombocytopenia, unsp trimester, fetus 1

This code signifies the presence of anemia and thrombocytopenia in a single fetus, where the gestational trimester at the time of diagnosis is not specified in the medical record. These conditions indicate a reduction in red blood cells and platelets, respectively, within the fetal circulatory system. It points to a potential underlying fetal pathology requiring further investigation.

Use this code when documentation clearly indicates both fetal anemia and fetal thrombocytopenia in a singleton pregnancy, but the specific trimester of diagnosis is not documented. This code is appropriate when the medical record identifies the affected fetus as "fetus 1" in a multiple gestation, or simply as the single fetus in a singleton pregnancy. Supporting documentation would include ultrasound reports, fetal blood sampling results, or maternal medical records noting these fetal conditions.

• Ensure documentation specifies both anemia and thrombocytopenia; if only one is present, a more specific code should be used.
• Verify that the trimester is truly unspecified; if documented, a more specific trimester code (O36.821-, O36.822-, O36.823-) should be selected.
• Confirm this is for a singleton pregnancy or the designated "fetus 1" in a multiple gestation; codes for other fetuses in multiple gestations have different last digits.