Peter J Ellis MD, MPH

Assistant Professor of Medicine (General Medicine)

Departments & Organizations

Yale Medical Group

Medical Education Staff

Office of Student ResearchInternal Medicine: General Internal Medicine: Internal Medicine Associates (YIMA)


I am a practicing General Internist with additional training in Public Health (MPH, 1995, Johns Hopkins) and Medical Education (General Internal Medicine Fellowship, Johns Hopkins 1992-1995). I haven been working as a Yale Faculty member since 1995. I provide comprehensive medical care to my own panel of 1300 patients at Yale Internal Medicine Associates including preventive care. I work with a group of physicians to voluntarily provide medical care to New Haven residents without health insurance, called Project Access New Haven. Additionally, I direct the Primary Care Clerkship for 4th year Yale Medical students.

Following is a more detailed biographical sketch:
I was born in 1961 in Milton, MA, graduated from Princeton University in 1983, UMDNJ-Robert Wood Johnson Medical School 1987, and then earned a Masters in Public Health from Johns Hopkins University School of Hygiene and Public Health in 1995. I joined the Yale Faculty in 1995 as Assistant Professor of Internal Medicine with a strong interest in teaching medical education and in caring for underserved individuals.
Together with my colleagues, we launched a successful outreach project providing medical care to homeless persons at the St Vincent DePaul Homeless Shelter. I worked as Interim Director of Public Health, City of Waterbury CT for 9 months during 2002 which afforded me an opportunity to think broadly about community health and introduced me to Project Access, a coordinated system of charity medical care to improve access and quality of care for uninsured, low income patients. In 2004 several colleagues and I obtained a Federal HRSA grant and successfully launched Project Access in Waterbury. In my role as Medical Director, I helped recruit over 300 physicians who agreed to provide voluntary care. The project remains successful and has donated over $3,000,000 in medical care to date.
In 2006 I joined Yale Internal Medicine Associates where I provide primary care to a panel of approximately 1300 patients living in the New Haven area. Recently, colleagues from the New Haven County Medical Association, the Yale Robert Wood Johnson Clinical Scholars Program,Yale-New Haven and Hospital of St. Raphael’s Hospital have launched Project Access New Haven to improve access to specialty medical care for low-income, uninsured persons living in New Haven. Over 200 physicians have agreed to donate medical care so far.
In January 2009 I became Director of the Yale Primary Care Clerkship, a one month course designed to enhance students’ skills to evaluate and care for patients in the ambulatory setting. Many students from this course see patients under the supervision of a preceptor at the Haven Free Clinic, where I precept and work as Faculty Advisor.
I am proudest of these three awards:
Volunteerism and Community Service Award, Connecticut Chapter of the American College of Physicians, 2003.
George Thornton Community Teacher of the Year, Yale Primary Care Internal Medicine Residency Program 2005.
Distinguished Service Award, New Haven County Medical Association, 2009.
I live in New Haven together with my wife Merceditas Villanueva, MD, Director of the Yale HIV Program. We have two children, Maliya age 9 and Ken, age 7, who keep us inspired and humbled.


  • B.S., Princeton University , 1983
  • M.D., UMDNJ - Robert Woods Johnson , 1987
  • M.P.H., Johns Hopkins School of Hygiene and Public Health , 1995

Selected Publication

  • Green ML, Ellis PJ. An evidence-based medicine curriculum utilizing residents’ patients: lessons from adult learning theory. Journal of General Internal Medicine 1997; 12(12): 742-50. Ellis PJ, Green ML, Kernan W. An evidence-based medicine curriculum for medical students: the art of asking focused clinical questions. Academic Medicine 2000; 75(5):528. Green ML, Ciampi MA, Ellis PJ. Residents’ Medical Informational Needs in Clinic: Are They Being Met? American Journal of Medicine 2000;109:218-223. Barrere CB, Ellis PJ. Changing Attitudes Among Nurses and Physicians: A Step Towards Collaboration. Journal for Healthcare Quality 2002; 24(3): 9-17. Butala N, Murk W, Horwitz L, Graber L, Bridger L, Ellis P. What is the Quality of Preventive Care Provided in a Student-Run Free Clinic? Journal of Health Care for the Poor and Underserved 23(2012): 414-424.

Latest Honor and Recognition

  • Fellow, American College of Physicians(2010) , American College of Physicians
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