Infections of bladder in pregnancy, first trimester

This code signifies a urinary tract infection specifically localized to the bladder (cystitis) occurring in a pregnant patient during her first trimester. It indicates an active infectious process affecting the lower urinary tract during the initial 12 weeks of gestation.

Apply this code when documentation confirms a diagnosis of cystitis in a pregnant patient who is in her first trimester. Supporting documentation should include a positive urine culture or urinalysis indicative of infection, alongside clinical symptoms such as dysuria, frequency, or urgency.

• Ensure the documentation clearly specifies "bladder" infection; do not use for upper urinary tract infections like pyelonephritis.
• Verify the trimester of pregnancy is explicitly stated as "first trimester" in the medical record.
• Do not use this code if the infection is resolved or if it occurred prior to the current pregnancy.