BACKGROUND: There may be patient concerns with switching to a biosimilar product. The purpose of this study was to describe the perspectives of patients with inflammatory bowel disease (IBD) after switching from reference product (RP) adalimumab to adalimumab-atto. RESEARCH DESIGN AND METHODS: This was a telephonic survey of US patients with IBD conducted in June-July 2023 among adult, English-speaking patients who were switched to biosimilar adalimumab-atto from RP adalimumab within the previous 100 days, and were receiving adalimumab-atto at the time of the survey. Consented participants were queried on adalimumab-atto safety and effectiveness, cost, product preference, and education received for the switch. Descriptive statistics were used to depict responses. RESULTS: Of the 250 patients contacted, 154 participants completed the survey. Respondents (77.9%) reported no concerns with loss of disease control, potential side effects (67.9%), or cost (89.5%) after switching. About 28.7% reported a preference for adalimumab-atto, while 39.3% reported no preference between products. About 43.7% reported being satisfied/very satisfied with the education they received, while 65.1% stated they did not feel they knew enough about adalimumab-atto. CONCLUSIONS: There was widespread satisfaction with adalimumab-atto after switching from RP adalimumab. Nevertheless, participants reported limited knowledge of adalimumab-atto, suggesting a need for enhanced education on biosimilars.