ICD-10 Code A56.00 – Chlamydial infection of lower genitourinary tract, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A56.00 – Chlamydial infection of lower genitourinary tract, unspecified
What it is
A56.00 identifies a chlamydial infection affecting the lower genitourinary tract when the site is not further specified. Use it for documented chlamydial infection involving the urethra, cervix, or related lower tract structures.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include urethral or cervical inflammation, dysuria, discharge, or other signs of lower genitourinary infection confirmed as chlamydial.
When to use this code
Use this code when the provider documents chlamydial infection of the lower genitourinary tract but does not specify a more exact anatomic site. It is appropriate when the record supports chlamydial lower-tract disease and no competing diagnosis is stated. If the documentation names a different chlamydial condition, code that condition instead.
Do not use for
Do not use A56.00 for chlamydial infection of other sites, such as rectal, pharyngeal, or upper genital tract involvement. Check documentation if the record describes a different STI, nonspecific urethritis, or pelvic inflammatory disease.
Coding tip
Code only what the clinician documents, and confirm that “lower genitourinary tract” is stated when the anatomic site is not otherwise specified.