Is A21 a billable code?
No. A21 is a header code that groups 7 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
A21: Tularemia
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
A21 groups related diagnoses under tularemia. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
A21 questions
What does A21 mean?
A21 is the ICD-10-CM code for Tularemia. It is in chapter 1, Certain infectious and parasitic diseases (A00-B99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.