ICD-10 Code A22.8 – Other forms of anthrax (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A22.8 – Other forms of anthrax
What it is
A22.8 identifies anthrax infections that do not fit the specific cutaneous, inhalational, gastrointestinal, or unspecified categories. Use it for documented anthrax presentations described as other forms.
Clinical signs
Clinical features vary; refer to documentation. Anthrax may present with signs of infection involving skin, lungs, or the gastrointestinal tract, but this code is reserved when the record describes another specified form.
When to use this code
Use A22.8 when the provider documents anthrax and clearly states a form that is not captured by the more specific anthrax codes. It is appropriate when the record supports anthrax but does not describe a standard site-based presentation. If the documentation is vague, check documentation before assigning this code.
Do not use for
Do not use this code for cutaneous, inhalational, gastrointestinal, or unspecified anthrax when a more specific code applies. Avoid it if anthrax is not confirmed or the documentation does not identify a distinct form.
Coding tip
Review the provider’s wording carefully and code the most specific anthrax form documented; if the type is unclear, query for clarification.