Plague (A20) ICD-10-CM
The A20 code range covers plague with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- infection due to Yersinia pestis
Codes in the A20 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A20 range.
Plague
An acute infectious disease caused by YERSINIA PESTIS that affects humans, wild rodents, and their ectoparasites. This condition persists due to its firm entrenchment in sylvatic rodent-flea ecosystems throughout the world. Bubonic plague is the most common form.
About the A20 Code Range
Plague is an infectious disease caused by Yersinia pestis that affects people, wild rodents, and parasites living on them.
The subdivisions distinguish A20.0 bubonic plague, the most common form, from forms involving the skin, lungs, brain and spinal cord lining, or blood. These have separate codes: A20.1, A20.2, A20.3, and A20.7, respectively. A20.8 identifies other forms, while A20.9 identifies unspecified plague.
Questions About This Page
How many billable codes are in the A20 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the A20 range classify?
The range classifies plague. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
