A74 – Other diseases caused by chlamydiae
ICD-10-CM 2027 diagnosis code · Other diseases caused by chlamydiae
ICD-10-CM code
A74
- Code
A74(claims format:A74)- Description
- Other diseases caused by chlamydiae
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A70-A74 Other diseases caused by chlamydiae
Billable codes under A74
A74 is a header code and cannot be used on claims. Choose the most specific code:
- A74.0 – Chlamydial conjunctivitisBillable
- A74.8 – Other chlamydial diseasesHeader (more codes below)
- A74.9 – Chlamydial infection, unspecifiedBillable
Notes for A74
Excludes1 (not coded here):
Excludes2 (not included here):
- chlamydial pneumonia (J16.0)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block A70-A74
Frequently asked questions
What is ICD-10 code A74?
A74 is the ICD-10-CM code for other diseases caused by chlamydiae, in the block A70-A74 (Other diseases caused by chlamydiae).
Is A74 a billable code?
No. A74 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.