A74Header code — not billable

Other diseases caused by chlamydiae

Chapter
1. Certain infectious and parasitic diseases
Category
A74
Effective date
October 1, 2026

Related codes in category A74

A74.0Chlamydial conjunctivitisYesA74.8Other chlamydial diseasesA74.81Chlamydial peritonitisYesA74.89Other chlamydial diseasesYesA74.9Chlamydial infection, unspecifiedYes

Frequently asked questions

What is ICD-10 code A74?

A74 is an ICD-10-CM diagnosis code for Other diseases caused by chlamydiae.

Is A74 a billable code?

No. A74 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is A74 in?

A74 falls under Chapter 1: Certain infectious and parasitic diseases.

When did A74 become effective?

A74 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to A74?

A74 belongs to category A74, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.