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ICD-10-CM tabular list

A70-A74Other diseases caused by chlamydiae

ICD-10-CM codes A70-A74 cover other diseases caused by chlamydiae, within certain infectious and parasitic diseases. The block holds 11 codes across 3 categories, of which 8 are billable and 3 are header codes that cannot be submitted on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • sexually transmitted chlamydial diseases (A55-A56)

What else to watch in A70-A74

  • 1 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.

Categories in A70-A74

ICD-10-CMFY2026-Apr· effective April 1, 2026