Introduction: Allergic bronchopulmonary aspergillosis (ABPA) is a hypersensitivity reaction to Aspergillus fumigatus, commonly observed in patients with asthma or cystic fibrosis. This study investigates the correlation between asthma severity, serum IgE levels, spirometry results, and high-resolution computed tomography (HRCT) findings in patients diagnosed with ABPA. Objective: To evaluate the relationship between asthma severity, immunological markers, and pulmonary function with HRCT imaging findings in ABPA patients. Methodology: A prospective study involving 125 patients diagnosed with ABPA was conducted and data on asthma severity, spirometry, IgE levels, and HRCT imaging were analyzed for correlations. Results: HRCT findings, such as bronchiectasis and mucus plugging, showed strong correlations with severe asthma, elevated IgE levels, and reduced spirometry measures, including FEV₁ and FEV₁/FVC ratios. Conclusion: HRCT findings are closely associated with immunological markers and spirometry results, underscoring the importance of integrated diagnostic approaches in managing ABPA.