Oth maternal infec/parastc diseases comp preg, third tri

This code signifies a maternal infection or parasitic infestation, other than those specifically classified elsewhere, that is adversely affecting a pregnancy during the third trimester. This includes conditions like toxoplasmosis, listeriosis, or other systemic infections that pose a risk to the mother or fetus.

Apply this code when a pregnant patient in her third trimester presents with a documented infectious or parasitic disease that is not explicitly covered by more specific O98 subcategories (e.g., syphilis, gonorrhea, viral hepatitis). Documentation should clearly state the specific infection and its impact or potential impact on the pregnancy.

• Always sequence this code as a secondary diagnosis, following the code for the specific infectious or parasitic disease.
• Ensure the medical record explicitly states the trimester of pregnancy to justify the "third trimester" specificity.
• Do not use this code for infections that have their own specific O98 subcategory (e.g., O98.0- for tuberculosis complicating pregnancy).