Protozoal diseases complicating pregnancy, first trimester

This code signifies a maternal protozoal infection, such as toxoplasmosis, malaria, or trichomoniasis, that is present during the first trimester of pregnancy. These infections can pose risks to both the mother and the developing fetus.

Apply this code when a pregnant patient in her first trimester is diagnosed with a protozoal disease. Documentation should clearly state the specific protozoal infection and confirm the gestational age or trimester.

• Always code the specific protozoal infection (e.g., B58.9 for toxoplasmosis, unspecified) as a secondary diagnosis.
• Ensure the medical record explicitly states "first trimester" or provides gestational weeks that fall within the first trimester (weeks 0-13).
• Do not use this code if the protozoal infection is not complicating the pregnancy or if the pregnancy is in a different trimester.