ICD-10 Code A56.0 – Chlamydial infection of lower genitourinary tract (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A56.0 – Chlamydial infection of lower genitourinary tract
What it is
A56.0 identifies chlamydial infection affecting the lower genitourinary tract, such as the urethra, cervix, or related lower tract structures. Use it when documentation specifies chlamydial infection in this anatomic area.
Clinical signs
Clinical features may include urethral or cervical inflammation, discharge, dysuria, or pelvic discomfort. Clinical features vary; refer to documentation.
When to use this code
Use A56.0 when the provider documents chlamydial infection of the lower genitourinary tract or a site-specific lower tract chlamydial infection. Code it when the diagnosis is confirmed or clearly stated in the record. Check documentation if the site is not specified.
Do not use for
Do not use this code for chlamydial infections at other sites, such as rectal, pharyngeal, or eye involvement. If the record only says “chlamydia” without location, check documentation.
Coding tip
Match the code to the documented anatomic site; lower genitourinary tract is not the same as extragenital chlamydial infection.