Purpose To assess the impact of a patient experience improvement program on national ranking in patient experience in a large academic radiology department. Materials and Methods This Health Insurance Portability and Accountability Act-compliant study was exempted from institutional review board approval. After initiating an electronic patient experience survey, 26 210 surveys and 22 213 comments were received from May 2017 to April 2018. During the study period, a multifaceted quality improvement initiative was instituted, focused on improving patient experience in the radiology department. The primary outcome was national percentile ranking as measured with the survey. Secondary outcome was the change in departmental percentile ranking compared with the overall hospital ranking for patient experience measured with a similar survey. Results The overall raw score for the department increased from 92.8 to 93.6 of 100 (P < .001), and the national ranking improved from the 35th to 50th percentile (P = .001). Improvements in raw scores related to personnel were primarily responsible for the increase in overall raw score and ranking. Of the 22 213 comments received, 3458 (15.6%) were negative. The percentage of negative comments was highly correlated with lower monthly percentile ranking (Pearson correlation coefficient of -0.69; P = .01). Conclusion It is feasible to develop a large-scale electronic survey to assess patient experience in the radiology department, to identify improvement opportunities, and to measurably improve patient experience. Changes in the percentage of negative comments were correlated with changes in a practice's national percentile rank in patient experience. © RSNA, 2019 Online supplemental material is available for this article. See also the editorial by Kruskal and Sarwar in this issue.