Infect of prt urinary tract in pregnancy, third trimester

This code signifies a urinary tract infection (UTI) affecting areas other than the bladder (e.g., kidney, ureter) occurring during the third trimester of pregnancy. It indicates an active infectious process within the upper urinary system or other non-cystitis locations in a pregnant patient nearing term.

Apply this code when documentation specifies a pregnant patient in their third trimester diagnosed with pyelonephritis, ureteritis, or other specified non-cystitis UTI. Supporting documentation should clearly state the site of infection and the gestational period.

• Ensure the documentation explicitly states "third trimester" or provides gestational weeks (e.g., 28 weeks and beyond) to confirm the correct trimester.
• Do not use for cystitis in pregnancy; refer to codes in the O23.1- category for bladder infections.
• Always sequence this code as a primary diagnosis when the UTI is the reason for the encounter, followed by codes for the specific organism if identified.