The Integrative Medicine Center Team

David L. Katz, MD, MPH, FACP, FACPM
Director, Integrative Medicine Center

Dr. Katz is a nationally renowned authority on nutrition, weight control, and the prevention of chronic disease. He has practiced primary care/Internal Medicine for over 15 years, and early in his career worked part-time as an emergency physician during a 6-year period.

He is an Associate Professor, Adjunct, of Public Health, and formerly the Director of Medical Studies in Public Health, at the Yale University School of Medicine. Dr. Katz directs the Yale-Griffin Prevention Research Center which he co-founded in 1998. As director of this clinical research laboratory dedicated to chronic disease prevention, Dr. Katz has served as Principal Investigator for numerous community and clinical trials.  More.


Ather Ali, ND, MPH
Co-Director, Integrative Medicine Center

Dr. Ali is Co-Director of the Integrative Medicine Center where he oversees Naturopathic care and education. He is also Assistant Director of Complementary/Alternative Medicine Research at the Yale-Griffin Prevention Research Center. He is an Associate Reserach Scientist at the Yale School of Medicine and co-chair of the Research Working Group of the Consortium of Academic Health Centers for Integrative Medicine. Dr. Ali completed a B.S. in Psychobiology from UCLA, doctorate in Naturopathic Medicine from Bastyr University in Seattle, residency in Integrative Family Medicine from Griffin Hospital and the University of Bridgeport, and a Masters of Public Health in Chronic Disease Epidemiology from the Yale School of Public Health. He completed a 3-year NIH/NCCAM National Research Service Award Postdoctoral Fellowship and is part of the leadership board of Integrative Medicine at Yale. He is licensed by the Connecticut Department of Public Health and credentialed by Griffin Hospital.


Holly Major, MSN, APRN-BC
Nurse Practitioner

Ms. Major is an Adult Nurse Practitioner with over 18 years experience in healthcare. She is a graduate of Western Connecticut State University. In addition to providing services at the Integrative Medicine Center, she is the Manager of Evidence Based Care and Therapeutic Touch Coordinator at Griffin Hospital. She is on the board of trustees for Nurse Healers Professional Associates International.



Lisa Rosenberger, ND, MS, LAc
Senior Resident Naturopathic Physician

Dr. Rosenberger is a graduate of the National College of Natural Medicine in Portland, Oregon. She graduated with a Doctorate of Naturopathic Medicine, Masters of Science in Oriental Medicine and Honors in Research in 2008. She is currently licensed in Oregon and Connecticut as a Naturopathic physician and in Florida as an Acupuncture physician/Doctor of Oriental medicine. Dr. Rosenberger’s undergraduate studies in Biology were started at Elizabethtown College in Pennsylvania and completed at the University of Maryland.

She has a special interest in understanding and treating chronic disease. She believes in reestablishing balance in the body by assessing the body's organ systems from both Naturopathic and Chinese medicines perspective. Her areas of specialty are drainage therapies, homeopathy, hydrotherapy, nutrition, acupuncture and Western and Chinese herbs. She recently completed her first year residency in Internal and Integrative Medicine at the Center of Natural & Integrative Medicine with Kirti Kalidas MD, ND in Orlando, Florida.


Barbara Siminovich-Blok , ND, MS
Resident Naturopathic Physician

Dr. Siminovich-Blok received her degree in Naturopathic Medicine from the University of Bridgeport College of Naturopathic Medicine in 2009 and was the recipient of their annual Clinical Excellence Award. Prior to her doctoral studies, she earned a BS in Chemical Engineering from the Universidad Iberoamericana in Mexico City, a MS in Biotechnology from the Univesidad Nacional Autonoma de Mexico, and a MS in Biochemistry from the University of Medicine and Dentistry of New Jersey. A native of Argentina, she is fluent in English, Spanish and French.

Board certified in Connecticut, Dr. Siminovich-Blok is an adjunct professor of Biochemistry at the University of Bridgeport where she is presently completing work on a Masters in Acupuncture. She is currently serving a two-year residency in Integrative Medicine at Griffin Hospital and the University of Bridgeport College of Naturopathic Medicine, which includes a research assistanceship at the Yale-Griffin Prevention Research Center. Some of her professional interests include pain management and Traditional Chinese Medicine.


Michelle Pinto-Evans
IMC Coordinator

Mrs. Pinto-Evans coordinates activities at the Integrative Medicine Center and has a dual role as Grants and Center Coordinator at the Yale-Griffin Prevention Research Center. She has worked at the Integrative Medicine Center since 2006 and at the Prevention Research Center since 2000. She is happy to answer any questions about the center and can be reached at (203) 732-1370.