ICD-10 Code A22.2 – Gastrointestinal anthrax (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A22.2 – Gastrointestinal anthrax
What it is
Use this code for anthrax infection involving the gastrointestinal tract after ingestion of contaminated material. It describes a serious bacterial illness affecting the stomach or intestines.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include abdominal pain, nausea, vomiting, fever, and bloody diarrhea, but the record should support gastrointestinal anthrax specifically.
When to use this code
Assign A22.2 when the provider documents gastrointestinal anthrax or confirms anthrax infection with digestive tract involvement. Use it for cases linked to ingestion exposure, not for nonspecific abdominal infection. If the site is unclear, check documentation before coding.
Do not use for
Do not use this code for cutaneous, inhalational, or other specified anthrax forms. Also avoid it when anthrax is only suspected or when the chart does not identify gastrointestinal involvement.
Coding tip
Match the code to documented anatomic site and exposure route; if either is missing, check documentation.