The evaluation of allergic alveolitis begins with a history and physical examination.

Physical findings in someone with allergic alveolitis may include:

• Increased size of the chest, due to chronic lung damage
• Rapid breathing
• Wheezing

Tests are necessary to confirm this diagnosis of allergic alveolitis and determine severity.

Tests that may be used to evaluate allergic alveolitis include:

• Chest x-ray
• Pulse oximetry:
• May show low oxygen levels
• Pulmonary function tests:
• Determines loss of lung function
• Lung biopsy
• Bronchoscopy:
• Can obtain a tissue sample to confirm the diagnosis
• CT scanning of the chest: a more sensitive method