ICD-10 Code A59.00 – Urogenital trichomoniasis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A59.00 – Urogenital trichomoniasis, unspecified
What it is
A59.00 identifies urogenital trichomoniasis when the infection is present but the record does not specify the site or further detail. Use it for trichomonas infection of the urogenital tract when documentation remains nonspecific.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include genital irritation, discharge, dysuria, or asymptomatic infection confirmed by testing for Trichomonas vaginalis.
When to use this code
Use this code when the provider documents urogenital trichomoniasis without naming a more specific anatomic site or subtype. It also fits cases where the note confirms trichomonal infection but does not distinguish vaginal, urethral, or other urogenital involvement. Check documentation if the record is unclear.
Do not use for
Do not use this code for trichomoniasis with a more specific code available, or for non-urogenital trichomonal infections. If the documentation does not confirm trichomoniasis, do not assign A59.00.
Coding tip
Query for the exact urogenital site when the note says only “trichomoniasis,” because a more specific code may apply.