In the Original Investigation titled “Effect of Perioperative Gabapentin on Postoperative Pain Resolution and Opioid Cessation in a Mixed Surgical Cohort: A Randomized Clinical Trial,”1 there was a Conflict of Interest Disclosures omission in the Article Information. The Conflict of Interest Disclosures should have read “Dr Mackey reported serving as president of the American Academy of Pain Medicine from 2014-2015, as a member of the American Society of Anesthesiologists Pain Committee from 2008-2019, and as a member of the advisory board of the American Chronic Pain Association (a nonprofit organization focused on patient education about pain), and reported receiving no compensation from these entities, and also reported receiving travel reimbursement from the American Academy of Pain Medicine, Tarsus Group, Neurovations, International Neuromodulation Society, and FDA-ACCTION to present pain research findings.” A letter of clarification has been published that explains the error.2 This article has been corrected. The article was previously corrected on February 14, 2018, to fix an error in the author listing.3