Trichomonal cystitis and urethritis

This code identifies inflammation of the bladder (cystitis) and/or urethra (urethritis) specifically caused by an infection with Trichomonas vaginalis. It indicates a genitourinary tract infection due to this parasitic protozoan.

Apply this code when documentation clearly states a diagnosis of cystitis or urethritis, and laboratory testing (e.g., wet mount, PCR) confirms the presence of Trichomonas vaginalis as the causative agent. This is typically seen in sexually transmitted infection (STI) clinics or gynecology/urology practices.

• Ensure documentation explicitly links Trichomonas vaginalis to the cystitis/urethritis.
• Do not use if the trichomonal infection is localized to the vagina (e.g., trichomonal vaginitis) without documented bladder or urethral involvement.
• Consider co-occurring STIs and code them separately if documented.