Placentitis, first trimester, fetus 1

This code identifies inflammation of the placenta occurring during the first trimester of pregnancy, specifically affecting the first fetus in a multiple gestation. Placentitis can be infectious or non-infectious and may lead to adverse pregnancy outcomes.

Assign this code when documentation confirms a diagnosis of placentitis in a singleton pregnancy or for the first fetus in a multiple gestation, with the condition identified during the first trimester. Supporting documentation should include diagnostic findings such as ultrasound reports, pathology results, or clinical notes detailing the inflammatory process.

• Ensure the trimester of diagnosis is clearly documented to differentiate from placentitis occurring in later trimesters.
• Verify the fetal count to correctly assign codes for single versus multiple gestations.
• Consider additional codes for the underlying cause of placentitis, if known and documented (e.g., specific infections).