President and Chief Operating Officer
Mass General Brigham Medical Group
Lindsay Gainer, MSN, RN is the President and Chief Operating Officer for the Mass General Brigham Medical Group. Lindsay has 25 years of experience in healthcare and has been in clinical operations for most of her career. In her current role, Lindsay has merged multiple community-based, employed medical groups into an optimized single management and corporate structure. Lindsay has overall operational and financial responsibility for the large multispecialty Medical Group, which consists of 220 practices across 3 states with almost 5,000 total employees, including 2,000 providers (both physicians and advance practice providers), and $900M in net patient service revenue. The Medical Group also has 18 urgent care locations, 3 free standing endoscopy/ambulatory surgery centers, and multiple other ancillary services such as radiology, cardiac testing, infusion, and lab. Lindsay is responsible for executing the operational strategy to improve efficiency and effectiveness, capitalize on best practices, improve quality, safety, and patient experience, and improve margin performance. Lindsay partners with the Mass General Brigham community hospital President/COOs to ensure successful achievement of annual system strategic goals and other critical priorities across the MGB Community Division.
In her prior roles as MGB Enterprise Vice President of Community Operations, Interim President, and Vice President of Operations at MGB Integrated Care, Lindsay played a critical role in the overall start up, strategic development, and management of a new, innovative ambulatory strategy for Mass General Brigham. Prior to her leadership roles in ambulatory operations, Lindsay had a variety of roles in nursing leadership and academia. Lindsay is also an Adjunct Faculty member at the MGB Institute of Healthcare Professions. Prior
Lindsay received her Bachelor of Science in Nursing and her Master of Science in Nursing and Health Care Systems from the University of North Carolina at Chapel Hill (UNC Chapel Hill). Her scholarly achievements include multiple publications and presentations and her research interests lie in health care policy and systems issues, with primary focuses in organizational behavior, quality, patient safety, operations improvement, and workforce development.
Lindsay’s areas of expertise are in clinical operations, improvement science, change management, Lean, care model redesign, spread of innovation, strategy deployment, high reliability systems, and population health management.
Emergency Preparedness in the Evolving Ambulatory Landscape
Monday, March 2, 2026
3:15pm - 4:15pm CT