Objective: The objective of the current study was to investigate the incidence of adhesive capsulitis in patients who had undergone coronary artery bypass graft (CABG) surgery. Introduction: Coronary artery bypass grafting (CABG) is considered to be one of the most painful surgical procedures, and patients can experience post-operative pain for several months. This can result in limitations in movement throughout the upper extremity, which can make daily tasks such as mobility, ambulation, and activities of daily living challenging. The surgery can lead to shoulder dysfunction due to restricted movement, incorrect positioning, and muscle division during surgery, as well as rib spreading. Method and Materials: In this cross-sectional study, a total of 273 patients between the ages of 51 and 60 years who had undergone CABG surgery were enrolled through convenient sampling. The Shoulder Pain and Disability Index (SPADI) questionnaire was distributed to all participants, and they were asked to complete it to determine the incidence of adhesive capsulitis. The collected data was analyzed using statistical software SPSS version 22.Conclusion: The study's findings indicated that the incidence of adhesive capsulitis among patients who had undergone CABG surgery was high, with more than three-quarters of the participants exhibiting symptoms of this condition. However, there were no significant findings in terms of severe pain and disability. Instead, post-CABG patients were observed to have mild to moderate pain and disability.