ICD-10 Code A74.89 – Other chlamydial diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A74.89 – Other chlamydial diseases
What it is
A74.89 identifies chlamydial infections not otherwise classified in the standard site-specific categories. Use it when documentation states another chlamydial disease, but does not name a more specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Chlamydial disease may present with site-specific inflammation or other infection findings, but you should code only what is clearly documented.
When to use this code
Use A74.89 when the provider documents an other or unspecified chlamydial disease and no more specific ICD-10-CM chlamydia code applies. It is appropriate when the record confirms a chlamydial infection but does not identify the exact condition or site. Check documentation if the note is incomplete.
Do not use for
Do not use this code when the record supports a more specific chlamydial diagnosis, such as a site-based or named chlamydial condition. Avoid it if the documentation is unclear and the diagnosis is not confirmed.
Coding tip
Look for the exact organism and disease wording in the provider note before assigning A74.89.