Eosinophilic asthma

This code represents a chronic inflammatory respiratory condition characterized by airway hyperresponsiveness and reversible airflow obstruction, specifically driven by an elevated presence of eosinophils in the airways and/or blood. It is a distinct phenotype of asthma often associated with more severe symptoms and a poorer response to conventional asthma therapies.

Assign this code when documentation explicitly identifies asthma as "eosinophilic" or indicates a diagnosis of severe asthma with evidence of eosinophilic inflammation (e.g., elevated blood eosinophil count, sputum eosinophilia). This diagnosis is typically made by an allergist or pulmonologist.

• Ensure documentation clearly specifies "eosinophilic" asthma; do not assume based on general severe asthma.
• Distinguish from other asthma types (e.g., allergic, non-allergic) if not specified as eosinophilic.
• Consider co-reporting with codes for specific asthma exacerbations (e.g., J45.x1 for mild persistent with acute exacerbation) if applicable.