ICD-10 Code A22.7 – Anthrax sepsis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A22.7 – Anthrax sepsis
What it is
A22.7 identifies sepsis caused by anthrax infection. Use it when documentation shows systemic illness from Bacillus anthracis, not a localized anthrax infection alone.
Clinical signs
Clinical features vary; refer to documentation. Sepsis may include fever, systemic toxicity, and organ dysfunction, with anthrax exposure or a confirmed anthrax source supporting the diagnosis.
When to use this code
Use A22.7 when the provider documents anthrax sepsis, septicemia due to anthrax, or systemic anthrax infection with sepsis. It may also apply when the record clearly links anthrax to the septic presentation. Check documentation if the note only mentions anthrax without sepsis.
Do not use for
Do not use this code for cutaneous, inhalational, or gastrointestinal anthrax without sepsis. Also avoid it when sepsis is present but anthrax is not documented as the cause.
Coding tip
Verify that the provider explicitly connects anthrax to sepsis before assigning A22.7.