A22 – Anthrax
ICD-10-CM 2027 diagnosis code · Certain zoonotic bacterial diseases
ICD-10-CM code
A22
- Code
A22(claims format:A22)- Description
- Anthrax
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A20-A28 Certain zoonotic bacterial diseases
Billable codes under A22
A22 is a header code and cannot be used on claims. Choose the most specific code:
- A22.0 – Cutaneous anthraxBillable
- A22.1 – Pulmonary anthraxBillable
- A22.2 – Gastrointestinal anthraxBillable
- A22.7 – Anthrax sepsisBillable
- A22.8 – Other forms of anthraxBillable
- A22.9 – Anthrax, unspecifiedBillable
Notes for A22
Includes:
- infection due to Bacillus anthracis
Frequently asked questions
What is ICD-10 code A22?
A22 is the ICD-10-CM code for anthrax, in the block A20-A28 (Certain zoonotic bacterial diseases).
Is A22 a billable code?
No. A22 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.