A74: Other diseases caused by chlamydiae
Codes under A74 (Other diseases caused by chlamydiae). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A74.0 | Chlamydial conjunctivitis | ✓ |
| A74.0 | Chlamydial conjunctivitis | ✓ |
| A74.8 | Other chlamydial diseases | — |
| A74.8 | Other chlamydial diseases | — |
| A74.9 | Chlamydial infection, unspecified | ✓ |
| A74.9 | Chlamydial infection, unspecified | ✓ |
| A74.81 | Chlamydial peritonitis | ✓ |
| A74.81 | Chlamydial peritonitis | ✓ |
| A74.89 | Other chlamydial diseases | ✓ |
| A74.89 | Other chlamydial diseases | ✓ |
Frequently asked questions
What is ICD-10-CM code A74?
A74 is an ICD-10-CM category covering Other diseases caused by chlamydiae. It contains 10 more specific diagnosis codes, 8 of which are billable.
Is A74 a billable code?
No — A74 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A74.0 — Chlamydial conjunctivitis). 8 of the 10 codes under A74 are billable.
What codes fall under A74?
A74 includes A74.0, A74.0, A74.8, A74.8, A74.9, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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