Background: Provider training in intrauterine device (IUD) procedures is a key strategy for improving evidence-based IUD care. We examined the influence of IUD training on IUD attitudes and practices among U.S. family planning providers.Methods: In 2019, we conducted a cross-sectional survey of U.S. family planning providers. We performed logistic regression to examine associations between training in routine IUD placement and specific IUD safety attitudes, con-fidence performing IUD procedures, and specific IUD practices.Results: Among 1,063 physicians and advanced practice clinicians, 85.1% reported training in routine IUD placement. Overall, IUD training was associated with accurately stating IUDs are safe for queried groups, including patients immediately postpartum (prevalence ratio [PR] 4.22; 95% confidence interval [CI] 1.29-13.85). Trained providers re-ported higher confidence in routine IUD placement for parous (PR 7.71; 95% CI 1.31-45.3) and nulliparous (PR 7.12; 95% CI 1.17-43.5) women and in IUD removal (PR 2.06; 95% CI 1.12-3.81). Among providers with IUDs available onsite, IUD training was associated with frequent same-day IUD provision for adults (PR 7.32; 95% CI 2.16-24.79) and adolescents (PR 7.63; 95% CI 2.22-26.24). Trained providers were also less likely to routinely use misoprostol before IUD placement for nulliparous (PR 0.19; 95% CI 0.11-0.33) and parous women (PR 0.07; 95% CI 0.03-0.16).Conclusion: Training in routine IUD placement was associated with evidence-based IUD safety attitudes, confidence in performing IUD procedures, and clinical practices aligned with Centers for Disease Control and Prevention contra-ception guidance. Expanding IUD training might increase evidence-based care and patient access to the full range of contraception, including IUDs. (c) 2022 Jacobs Institute of Women's Health, George Washington University. Published by Elsevier Inc. All rights reserved.