Thomas H. Lee, an internist and cardiologist, is network president for Partners HealthCare System and chief executive officer for Partners Community HealthCare, Inc., the integrated delivery system founded by Brigham and Women's Hospital and Massachusetts General Hospital. He is a graduate of Harvard College (1975), Cornell University Medical College (1979), and Harvard School of Public Health (1987). He completed his training in internal medicine and cardiology in 1985 at Brigham and Women's Hospital and received his master of science in epidemiology in 1987 from the Harvard School of Public Health. Before becoming CEO for Partners Community Healthcare in 2004, he had served as its chief medical officer since the organization's inception, in 1995. Lee is a professor of medicine at Harvard Medical School and a professor of health policy and management at Harvard School of Public Health. His research interests include risk stratification and optimal management strategies for common cardiovascular problems and improvement of quality of care, with a particular focus on critical pathways, guideline development and implementation, and managed care. Lee is co-chair of the Committee for Performance Measures of the National Committee for Quality Assurance (NCQA), and has been the chairman of NCQA's Cardiovascular Measurement Advisory Panel since 1996. He is a member of the board of Bridges to Excellence and a director of the Geisinger Health System Foundation.He is the editor-in-chief for The Harvard Heart Letter and associate editor of The New England Journal of Medicine.