A74.9

ICD-10Billable

Chlamydial infection, unspecified

Official ICD-10-CM descriptor (FY2026)

Chlamydial infection, unspecified

A74.9 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Chlamydiosis NOS

Related codes in A74

A74.0Chlamydial conjunctivitis
A74.8Other chlamydial diseasescategory

Where this code sits

Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: Other diseases caused by chlamydiae (A70-A74)
Parent code: A74

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Source

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.