Original ArticlesThe Effect of Clinicians' Personal Acquaintance on Specialty Care Coordination as the Sharing of an EHR IncreasesVimalananda, Varsha G. MD, MPH; Wormwood, Jolie B. PhD; Qian, Shirley MS; Meterko, Mark PhD; Sitter, Kailyn E. MS; Fincke, B. Graeme MD Author Information Center for Healthcare Organization and Implementation Research (CHOIR), VA Bedford Healthcare System, Bedford, Massachusetts (Drs Vimalananda, Wormwood, and Fincke and Mss Qian and Sitter); Section of Endocrinology, Diabetes and Metabolism, Boston University School of Medicine, Boston, Massachusetts (Dr Vimalananda); Department of Psychology, University of New Hampshire, Durham (Dr Wormwood); VHA Office of Reporting, Analytics, Performance, Improvement and Deployment (RAPID–10EA), Field-based at the Edith Nourse Rogers Memorial VA Medical Center, Bedford, Massachusetts (Dr Meterko); and Department of Health Law, Policy and Management, Boston University School of Public Health, Boston, Massachusetts (Drs Meterko and Fincke). Correspondence: Varsha G. Vimalananda, MD, MPH, Center for Healthcare Organization and Implementation Research (CHOIR), VA Bedford Healthcare System, Bedford, MA 01730 ([email protected]). This work was funded by VA HSR&D Career Development Award 15-070-3 (Dr Vimalananda) and supported in part by resources from the VA Bedford Healthcare System. The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the Department of Veterans Affairs or the US government. The authors have no conflicts of interest to disclose. Journal of Ambulatory Care Management: July/September 2021 - Volume 44 - Issue 3 - p 227-236 doi: 10.1097/JAC.0000000000000381 Buy Metrics Abstract We used an online survey to measure how personal acquaintance with referring primary care providers (PCPs) affects specialists' experience of care coordination as use of a shared electronic health record (EHR) increases. Only 9% of specialists rated Overall Coordination as 9 or 10 out of 10. Personal acquaintance positively impacted Overall Coordination and all measured coordination subdomains. This effect was attenuated, but persisted, even at higher levels of EHR sharing. The impact of a shared EHR alone was limited to Overall Coordination and the Data Transfer subdomains. Health systems can improve coordination through investment in clinician relationships, while research should address the gaps in coordination even with widespread personal acquaintance and shared EHRs. © 2021 Wolters Kluwer Health, Inc. All rights reserved.