ICD-10 Code A56.01 – Chlamydial cystitis and urethritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A56.01 – Chlamydial cystitis and urethritis
What it is
This code identifies a Chlamydia trachomatis infection involving the urethra and bladder. Use it when documentation specifically states chlamydial cystitis, urethritis, or both.
Clinical signs
Findings may include dysuria, urethral discharge, urinary frequency, or suprapubic discomfort. Clinical features vary; refer to documentation.
When to use this code
Use A56.01 when the provider documents chlamydial infection limited to the urinary tract, especially cystitis or urethritis. It is appropriate for confirmed or clinically diagnosed cases documented in the record. If the note only says “chlamydia” without site, check documentation.
Do not use for
Do not use this code for nongonococcal urethritis without chlamydial documentation, or for infections at other anatomic sites. If the record indicates a different chlamydial manifestation, code that condition instead.
Coding tip
Verify the site and organism in the provider note before assigning A56.01.