Diagnosis Code


Code Information

Diagnosis Code: A74.9

Short Description: Chlamydial infection, unspecified

Long Description: Chlamydial infection, unspecified

The code A74.9 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Other diseases caused by chlamydiae (A70-A74)
      • Other diseases caused by chlamydiae (A74)
        • A74.9 Chlamydial infection, unspecified

Code Version: 2020 ICD-10-CM


  • Chlamydia trachomatis infection
  • Chlamydia trachomatis infection in mother complicating childbirth
  • Chlamydial conjunctivitis
  • Chlamydial infection
  • Neonatal bacterial conjunctivitis
  • Neonatal chlamydial conjunctivitis
  • Neonatal chlamydial infection
  • Trachoma

Diagnostic Related Group(s)

The code A74.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Viral Illness With Mcc (865)
  • Viral Illness Without Mcc (866)

References to Index of Diseases and Injuries

The code A74.9 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Chlamydiosis NOS

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A74.9 Right Arrow 079.98 Chlamydial infection NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
A74 Other diseases caused by chlamydiae
A74.0 Chlamydial conjunctivitis
A74.8 Other chlamydial diseases
A74.81 Chlamydial peritonitis
A74.89 Other chlamydial diseases

This page was last updated on: 10/1/2019