A74
ICD-10Non-billable categoryOther diseases caused by chlamydiae
Official ICD-10-CM descriptor (FY2026)
Other diseases caused by chlamydiae
A74 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- neonatal chlamydial conjunctivitis (P39.1)
- neonatal chlamydial pneumonia (P23.1)
- Reiter's disease (M02.3-)
- sexually transmitted chlamydial diseases (A55-A56)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- chlamydial pneumonia (J16.0)
More specific codes under A74
Where this code sits
Krasyn AI Coder
Get code suggestions automatically as you type notes. Free for 50 analyses.
Install for Chrome — freeSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.