2026 ICD-10-CM Diagnosis Code A74Other diseases caused by chlamydiae
A74 is a non-billable ICD-10-CM category code for other diseases caused by chlamydiae, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A74.0, A74.81, A74.89, and A74.9.
Code Identity
Code Classification
Specific Coding for Other diseases caused by chlamydiaeOverview
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- neonatal chlamydial conjunctivitis P39.1
- neonatal chlamydial pneumonia P23.1
- Reiter's disease M02.3
- sexually transmitted chlamydial diseases A55 A56
Type 2 Excludes
- chlamydial pneumonia J16.0
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Patient EducationClinical
Bacterial Infections
Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.
The full article covers:
- What are bacteria?
- How do bacterial infections spread?
- What are the treatments for bacterial infections?
- Can bacterial infections be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About A74Overview
Is A74 (Other diseases caused by chlamydiae) a billable code?
No. This is a category header that groups the codes for other diseases caused by chlamydiae, and headers cannot be submitted on claims. Claims for other diseases caused by chlamydiae need a more specific code from this category, such as A74.0, A74.81, and A74.89.
