Pulmonary anthrax

This code represents a severe bacterial infection of the lungs caused by Bacillus anthracis, specifically acquired through inhalation of spores. It is a life-threatening form of anthrax characterized by rapid progression of respiratory symptoms, often leading to septic shock and death if untreated.

Use this code for confirmed cases of pulmonary anthrax, typically seen in bioterrorism events or occupational exposure to infected animals or contaminated animal products. Documentation should clearly indicate respiratory involvement and a confirmed diagnosis of anthrax, often supported by laboratory findings.

• Distinguish from cutaneous anthrax (022.0) or gastrointestinal anthrax (022.2), which have different clinical presentations and routes of infection.
• Always sequence as the primary diagnosis when it is the reason for the encounter.
• Ensure documentation specifies the site of infection as pulmonary; "anthrax" alone is insufficient.