Endocrinology, Diabetes and Metabolism

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Anastassios G. Pittas, MD, MS accepting new patients


Programs + Specialties
Training + Education Cornell University Medical College; New York Presbyterian Hospital; Tufts Medical Center
Board Certifications Endocrinology, Diabetes and Metabolism
NPI # 1508976036
Gender Male
Language(s) Greek
Accepted Insurances View Accepted Insurances at Tufts MC + Floating Hospital

Locations + Directions

Tufts Medical Center
Biewend Building, 2nd Floor
800 Washington St.
Box 268
Boston, MA 02111
Phone #: 617-636-5689
Fax #: 617-636-4719

Honors + Awards

2018, "Top Doctor," Boston Magazine
2017, "Top Doctor," Boston Magazine
2017, Biomedical Research Exemplar Award which honors individuals doing high-quality, high-impact, federally-funded research who also maintain an impressive reputation for professionalism and integrity in their work.
2017, The Donna Seto-Young Award which recognizes meritorious achievement in the advancement of science, education, practice of medicine or improvement of human health and well-being.
2016, "Top Doctor," Boston Magazine
2014 - 2015, Chair (Standing), NIH Study Section - Clinical & Integrative Diabetes and Obesity
2011 - 2014, Member (Standing), NIH Study Section - Clinical & Integrative Diabetes and Obesity
2012, Robert M. Russell Scientific Achievement Award, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University
2007, Oliver Smith Award Tufts Medical Center

Publications + National Presentations

1. Shahraz S, Pittas AG, Thomas C, Saadati M and Kent D. Change in testing, awareness of HbA1c levels, and glycemic control in US adults, 2007-2014. JAMA 2017 Nov 14;318(18):1825-1827

2. Lewis MR, Macauley RC, Sheehan PR, Staten MA, Phillips LS, Rasouli N and Pittas AG, D2d Research Group. Management of hemoglobin variants detected incidentally in HbA1c testing: a common problem currently lacking a standard approach. Diabetes Care 2017 Feb 40 (2):e8-e9. 3. Shahraz S, Pittas AG and Kent D. Less is More: Prediabetes risk in adult Americans According to a risk test. JAMA IM 2016.

4. Pittas AG, Westcott G and Balk EM. Technosphere Inhaled Insulin for Patients with Diabetes: A Systematic Review and Meta-analysis Lancet Diabetes Endocrinol 2015:3(11):886-94.

5. Balk EM, Early A, Raman G, Avendano EA, Pittas AG and Remington PL. Combined Diet and Physical Activity Promotion Programs to Prevent Type 2 Diabetes Among Persons at Increased Risk: A Systematic Review for the Community Preventive Services Task Force. Ann Intern Med online 14 July 2015

6. Pittas AG, Dawson-Hughes B, Sheehan PR, Rosen CJ, Ware JH, Knowler WC, Staten MA and the D2d Research Group. Rationale and Design of the Vitamin D and Type 2 Diabetes Study: A Diabetes Prevention Trial. Diabetes Care 2014 Dec;37(12):3227-34.

7. Pittas AG, Nelson J, Mitri J, Hillmann W, Garganta C, Nathan DM, Hu FB and Dawson-Hughes B. Plasma 25-hydroxyvitamin D and progression to diabetes in patients at risk for diabetes: an ancillary analysis in the Diabetes Prevention Program. Diabetes Care 2012:35(3):565-573

8. Pittas AG, Chung M, Trikalinos TA, Mitri J, Brendel M, Patel K, Lichtenstein AH, Lau J and Balk E. Vitamin D and Cardiometabolic Outcomes: A Systematic Review. Ann Intern Med 2010:152(5):307-314

9. Amori R, Lau J and Pittas AG. Efficacy and Safety of Incretin Therapy in Type 2 Diabetes. Systematic Review and Meta-analysis JAMA 2007:298(2):194-206

10. Ceglia L, Lau J and Pittas AG. Efficacy and safety of inhaled insulin therapy in adults with diabetes mellitus. A systematic review. Ann Intern Med 2006:145:665-675


I was born and raised in Greece and came to the U.S. many, many, many years ago to attend college. At MIT, not only did I earn a S.B. degree in Biology but also met my future spouse. After we completed our M.D. degrees at Weill Medical College of Cornell University and Internal Medicine Residencies at the New-York Presbyterian Hospital-Weill Cornell in New York City, Helen and I moved to Boston. Following my Fellowship in Endocrinology at Tufts Medical Center, I joined the staff in the Division of Endocrinology at Tufts Medical Center in 2000.

From 2000 and 2002, I was supported by a generous grant from the Friedman NY Foundation for Medical Research. In 2002, I was fortunate to become the recipient of a National Institutes of Health K23 Career Development Award to focus on diabetes research. During this period, in keeping with the goal of the Award, I earned a M.S. degree in Clinical Research from the Sackler School of Biomedical Sciences at Tufts University. The degree provided me with formal training on clinical research and I highly recommend this kind of training to aspiring clinical researchers. During the K23 period – long story – I became interested in the role of vitamin D in diabetes. Working with wonderful colleagues, I received NIH funding (R21 and R01 mechanisms) to further test the idea. One thing led to another and before I knew it, I was leading the D2d study (www.d2dstudy.org), a multi-center clinical trial to test the safety and efficacy of vitamin D supplementation in reducing risk of diabetes in people at high risk. D2d consumes most of my time while awake (and occasionally my non-awake time) but I do try to remain active in all three areas of academic medicine (clinical care, research and teaching), a task which is becoming increasingly challenging.

In terms of formal positions, I am a Professor of Medicine at Tufts University School of Medicine and Adjunct Professor of Nutrition and Policy at Tufts University Friedman School of Nutrition, Science and Policy. I also serve as the Associate Director of the Endocrinology Fellowship Program at Tufts Medical Center. In 2016 and 2017, I was named as one of Top Docs by Boston Magazine. If you need to find out more, please visit www.agpittas.com.

News, Media + Videos

Anastassios Pittas, MD an endocrinologist at Tufts Medical Center in Boston.

Does vitamin D ward off diabetes?

Learn more about the national study
Group of hands holding a silver ribbon with a blood drop on it.

Vitamin D does not reduce likelihood of developing diabetes

Learn more about the study
Boston Magazine 'Top Doctor' Award 2016

Boston magazine honors 2016 “Top Doctors” at Tufts Medical Center and Floating Hospital for Children.

2016 Boston magazine Top Doctors
Anastassios Pittas, MD an endocrinologist at Tufts Medical Center in Boston.

Physician receives $40 Million NIH grant for nationwide clinical trial on vitamin D and diabetes.

Diabetes research granted $40 million
A doctor and her patient at Tufts Medical Center in Boston.

Our researchers are using a grant from the NIH to study the impact of vitamin D on diabetes.

Learn more about our research
Boston Magazine 'Top Doctor' Award 2017

Boston Magazine honors 2017 “Top Doctors” at Tufts Medical Center and Floating Hospital for Children.

2017 Boston Magazine Top Doctors
Dr. Clarissa Yang on the cover of 2019 Boston Magazine Top Doctor issue.

2019 “Top Doctors” at Tufts MC and Floating Hospital

See our Top Doctors


1. The role of vitamin D in health and disease - Primary Care Physicians, Endocriniology
2. Pharmacotherapy of type 2 diabetes - Primary Care Physicians

Research Grants

1. Vitamin D and Type 2 Diabetes (D2d), supported by NIH. Major goal: to conduct a multi-center randomized trial of vitamin D supplementation for prevention of type 2 diabetes www.d2dstudy.org

2. The role of vitamin D in established Type 2 Diabetes, supported by NIH. Major goal: to define the effects of vitamin D on glucose metabolism in patients with established type 2 diabetes.

3. W81XWH-12-2-2055 Roberts (PI), supported by Department of Defense. Major goal: To develop more effective approaches for sustainable weight loss that can be scaled into nationally effective programs in different groups including military families.