ICD-10 Code B37.41 – Candidal cystitis and urethritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B37.41 – Candidal cystitis and urethritis
What it is
B37.41 identifies Candida infection involving the bladder and/or urethra. Use it when documentation shows candidal cystitis, candidal urethritis, or both.
Clinical signs
Clinical features vary; refer to documentation. You may see urinary irritation, dysuria, frequency, urgency, or evidence of Candida in the urinary tract.
When to use this code
Use this code when the provider documents a Candida infection limited to the bladder or urethra. It is appropriate for confirmed candidal cystitis, candidal urethritis, or both structures together. If the record only says “fungal UTI,” check documentation before coding.
Do not use for
Do not use B37.41 for nonspecific urinary symptoms without documented Candida infection. Do not use it when the infection is elsewhere, such as vulvovaginal candidiasis or systemic candidiasis.
Coding tip
Code the site exactly as documented; if the note says only “Candida UTI,” verify whether bladder or urethra is specified.