Unsp infct of urinary tract in pregnancy, first trimester

This code signifies a urinary tract infection (UTI) occurring during the first trimester of pregnancy, where the specific type of infection (e.g., cystitis, pyelonephritis) is not documented. It indicates the presence of a bacterial infection within the urinary system in a pregnant patient early in her gestation.

Apply this code when a pregnant patient in her first trimester is diagnosed with a UTI, but the physician documentation does not specify the anatomical site or type of infection. This is appropriate for documentation stating "UTI in pregnancy, first trimester" without further detail.

• Ensure the documentation explicitly states "first trimester" for accurate trimester assignment.
• If the type of UTI (e.g., cystitis, pyelonephritis) is specified, use a more specific code from the O23 category.
• Always sequence this code as a secondary diagnosis following the code for the pregnancy itself (Z3A.xx).