ICD-10 Code B44.81 – Allergic bronchopulmonary aspergillosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B44.81 – Allergic bronchopulmonary aspergillosis
What it is
B44.81 identifies allergic bronchopulmonary aspergillosis, a hypersensitivity reaction to Aspergillus in the airways. It is used when the condition is documented as ABPA, not simple asthma or fungal colonization.
Clinical signs
Typical features include asthma, wheezing, cough, mucus plugging, and recurrent pulmonary infiltrates. Clinical features vary; refer to documentation for evidence of Aspergillus-related allergic lung disease.
When to use this code
Use B44.81 when the provider documents allergic bronchopulmonary aspergillosis, ABPA, or a similar confirmed diagnosis. It may also fit cases described as Aspergillus-related hypersensitivity with bronchial involvement. Code only when the record supports this specific diagnosis.
Do not use for
Do not use this code for uncomplicated asthma, allergic rhinitis, or isolated Aspergillus exposure without ABPA. Check documentation if the chart only mentions fungal infection or colonization.
Coding tip
Look for the exact phrase ABPA or documented allergic bronchopulmonary aspergillosis before assigning B44.81.