A74
⚠ Non-billable
Other diseases caused by chlamydiae
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A74
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- 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, but may code together
- chlamydial pneumonia (J16.0)
Frequently asked questions
What is ICD-10 code A74?
ICD-10-CM code A74 represents Other diseases caused by chlamydiae. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A74 billable?
No. A74 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A74 in?
A74 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A74 category
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