ICD-10 Code for UTI: N39.0 Coding, Billing & Denial Prevention Guide (2026)
Every UTI claim that goes out coded as N39.0 when the provider’s notes say “acute cystitis” is a denial waiting to happen. And it happens constantly. According to OIG audit data, more than 27% of diagnostic coding errors involve nonspecific codes, including UTI classifications. That’s roughly one in four UTI claims carrying avoidable risk. The […]
