The aim of this study was to evaluate the effects of adding osteopathic visceral manipulation (OVM) to a standard physical therapy program on pain, functional disability, and range of motion (ROM) in patients diagnosed with right shoulder adhesive capsulitis (AC). A total of 49 patients aged between 40 and 65 years who were diagnosed with right shoulder AC were included in the study. Randomized patients received a standard physical therapy program for three weeks, consisting of 15 sessions (5 days per week) in both treatment groups. The standard program included hot pack application to the shoulder region for 20 min, conventional transcutaneous electrical nerve stimulation (TENS) for 20 min, and ultrasound therapy at 1.5 W/cm² for 10 min. In addition to the standard physical therapy program, Group 1 (n=25) received OVM once weekly, while Group 2 (n=24) received sham OVM once weekly. Pain was evaluated using the Visual Analog Scale (VAS), while functional disability was evaluated using the Shoulder Pain and Disability Index (SPDI). The ROM values were also recorded.