A74 ICD-10-CM Code: Other diseases caused by chlamydiae
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
A74Other diseases caused by chlamydiae
ICD-10-CM diagnosis code · United States clinical modification
Where A74 sits
- 1
Chapter 1
Certain infectious and parasitic diseases (A00-B99)
- 2
Section
Other diseases caused by chlamydiae (A70-A74)
- 3
Category A74
Other diseases caused by chlamydiae
- 4
Code A74
Other diseases caused by chlamydiae
Codes under A74
A74 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for A74.
Code first
No “code first” instruction is listed for A74.
Use additional code
No “use additional code” instruction is listed for A74.
Excludes1
Conditions that should not be reported together with this code.
- neonatal chlamydial conjunctivitis (P39.1)
- neonatal chlamydial pneumonia (P23.1)
- Reiter's disease (M02.3-)
- sexually transmitted chlamydial diseases (A55-A56)
Excludes2
Conditions not included here that may be reported separately when present.
- chlamydial pneumonia (J16.0)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code A74 mean?
A74 is the FY 2027 U.S. ICD-10-CM code for “Other diseases caused by chlamydiae.”
Is A74 a billable or specific ICD-10-CM code?
No. A74 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is A74 located in ICD-10-CM?
A74 is listed in Chapter 1, Certain infectious and parasitic diseases (A00-B99), within Other diseases caused by chlamydiae (A70-A74) (A70–A74), under category A74, Other diseases caused by chlamydiae.
What coding notes are listed for A74?
No inclusion terms are listed for A74 in this reference record. No code-first instruction is listed. Excludes1 notes: neonatal chlamydial conjunctivitis (P39.1); neonatal chlamydial pneumonia (P23.1); Reiter's disease (M02.3-); sexually transmitted chlamydial diseases (A55-A56). Excludes2 notes: chlamydial pneumonia (J16.0).