Gastrointestinal anthrax

This code represents a specific form of anthrax infection localized to the gastrointestinal tract. It is caused by Bacillus anthracis spores ingested through contaminated food or water, leading to severe inflammation, ulceration, and potential systemic complications.

Apply this code when documentation clearly indicates a diagnosis of anthrax with primary manifestation in the GI system, such as enteritis, colitis, or oropharyngeal lesions. Supporting documentation includes positive cultures for B. anthracis, endoscopic findings, or biopsy results consistent with gastrointestinal anthrax.

• Ensure documentation specifies the gastrointestinal system as the primary site of infection to differentiate from cutaneous or inhalational forms.
• Do not confuse with other bacterial gastroenteritis codes; anthrax is a distinct etiology.
• Sequence as the primary diagnosis when it is the reason for the encounter.