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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 + Tufts Children's Hospital

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

2020, 2019, 2018/2017, 2016 "Top Doctor," Boston Magazine
2021, 2020, 2019, Cigna Care Designated and Tier 1 Physician. This designation is given to physicians in the highest group for quality measures and cost efficiency.
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.
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, given in recognition of excellence, compassion and extraordinary and thoughtful care and service to patients, Tufts Medical Center, Boston MA

Below are representative publications.

Pittas AG and Balk EM. Untangling the Gordian Knot of vitamin D supplementation and type 2 diabetes prevention Diabetes Care 2020

Angellotti E, Muppavarapu S, Siegel R and Pittas AG. The calculation of the glucose management indicator (GMI) is influenced by the continuous glucose monitoring system and patient race. Diabetes Technology and Therapeutics 2019 Dec 31. PMID:3182101

Delichatsios HK and Pittas AG Integrating Nutrition Education into Clinical Practice. Nestle Nutr Inst Workshop Ser. 2019;92:171-182. doi: 10.1159/000499560. Epub 2019 Nov 28

Pittas AG et al. Vitamin D supplementation and prevention of type 2 diabetes. N Engl J Med 2019 Aug 8:381(6):520-530. PMID:31173679

Angellotti E, Wong JB, Pierce A, Hescott B and Pittas AG. Combining Wireless Technology and Behavioral Economics to Engage Patients (WiBEEP) with cardiometabolic disease: a pilot study. Pilot Feasibility Stud. 2019 Jan 15;15:5; PMC6332845

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

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.

Shahraz S, Pittas AG and Kent D. Less is More: Prediabetes risk in adult Americans According to a risk test. JAMA IM 2016.

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.

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

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.

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

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

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

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

Dr. Anastassios Pittas was born and raised in Greece and came to the U.S. many years ago to attend college. At MIT, not only did he earn a B.S. degree in Biology, but also met his future spouse, Helen. Both earned their medical degrees at Weill Medical College of Cornell University and completed Internal Medicine Residencies at the New-York Presbyterian Hospital-Weill Cornell in New York City before moving to Boston. Following a Fellowship in Endocrinology at Tufts Medical Center, Dr. Pittas joined the staff in the Division of Endocrinology in 2000.

From 2000 and 2002, Dr. Pittas was supported by a generous grant from the Friedman NY Foundation for Medical Research. In 2002, he 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, he earned a M.S. degree in Clinical Research from the Sackler School of Biomedical Sciences at Tufts University. The degree provided him with formal training on clinical research and during that time, he became interested in the role of vitamin D in diabetes. Working with wonderful colleagues, he received NIH funding (R21 and R01 mechanisms) to further test the idea and ultimately led the D2d study (, 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.

Dr. Pittas is 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. He also serves as the Associate Director of the Endocrinology Fellowship Program at Tufts Medical Center.

You can learn more about Dr. Pittas by visiting his website at

Top Doctors Boston Magazine 2020

2020 “Top Doctors” at Tufts MC and Tufts Children's Hospital

See our Top Doctors
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 Tufts Children's Hospital.

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 Tufts Children's Hospital.

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 Tufts Children's Hospital

See our Top Doctors

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

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

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.