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ICD-10-CM/Certain infectious and parasitic diseases

A20-A28

Certain zoonotic bacterial diseases (A20-A28)

A20-A28 contains 9 categories and 57 ICD-10-CM codes for FY2027.

A20Plague7 billable
A21Tularemia7 billable
A22Anthrax6 billable
A23Brucellosis6 billable
A24Glanders and melioidosis5 billable
A25Rat-bite fevers3 billable
A26Erysipeloid4 billable
A27Leptospirosis4 billable
A28Other zoonotic bacterial diseases, not elsewhere classified5 billable

Every ICD-10-CM code, and whether you can actually bill it

Built directly from the official ICD-10-CM FY2027 release published by the CDC / National Center for Health Statistics and CMS.

FY2027 codes are valid for encounters from October 1, 2026 through September 30, 2027.

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Coding guides

Billable vs Non-Billable ICD-10 Codes Explained
Excludes1 vs Excludes2 in ICD-10-CM: The Difference
Unspecified codes and denial risk
ICD-10-CM 7th Characters (A, D, S) and Placeholder X
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