
Join to view full profile
OF PO Box# 1959Seattle, WA 98195
Phone+1 206-598-4882
Fax+1 206-520-5620
Dr. Hagopian is on Doximity
As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.
- Gain access to free telehealth tools, such as our “call shielding” and one-way patient texting.
- Connect with colleagues in the same hospital or clinic.
- Read the latest clinical news, personalized to your specialty.
Education & Training
University of WashingtonFellowship, Endocrinology, Diabetes, and Metabolism, 1989 - 1994
University of WashingtonResidency, Internal Medicine, 1987 - 1989
University of Chicago Division of the Biological Sciences The Pritzker School of MedicineClass of 1987
Certifications & Licensure
CA State Medical License 1993 - Present
WA State Medical License 1989 - 2026
Publications & Presentations
PubMed
- Dietary vitamin C intake and the risk of islet autoimmunity and type 1 diabetes: The Environmental Determinants of Diabetes in the Young (TEDDY) Study.Markus Mattila, Lazarus K Mramba, Sari Niinistö, Iris Erlund, Xiang Liu
European Journal of Nutrition. 2026-09-24 - Clasen et al. respond to "Thyroid autoimmunity in the TEDDY cohort: is HLA 8.1 haplotype the hidden driver?"Joanna L Clasen, Hemang M Parikh, William A Hagopian
American Journal of Epidemiology. 2026-09-03 - Thyroid autoimmunity and the subsequent development of islet and celiac autoimmunity in the TEDDY study.Joanna L Clasen, Berglind Jonsdottir, Kendra Vehik, Kristian F Lynch, Hemang M Parikh
American Journal of Epidemiology. 2026-08-05
Journal Articles
- Temporal Development of the Gut Microbiome in Early Childhood from the TEDDY StudyRichard E Lloyd, Marian Rewers, William Hagopian, Ramnik J Xavier, Nature
- The Human Gut Microbiome in Early-Onset Type 1 Diabetes from the TEDDY StudyRamnik J Xavier, Marian J Rewers, William A Hagopian, Nature
- The Environmental Determinants of Diabetes in the Young (TEDDY) Study: 2018 UpdateMarian Rewers, Desmond Schatz, William Hagopian, Current Diabetes Reports
Press Mentions
New Data Shed Light on Type 1 Diabetes Male PredominanceAugust 16th, 2024
Combined Risk Score Predicts Type 1 Diabetes in BabiesAugust 10th, 2020
New Test Better Predicts Which Babies Will Develop Type 1 DiabetesAugust 7th, 2020
Grant Support
- Whole Protein Arrays to Detect Antimicrobial Antibodies Associated with Triggering and Progression of Islet Autoimmunity in TEDDYARIZONA STATE UNIVERSITY-TEMPE CAMPUS2024–2027
- The Environmental Determinants Of Diabetes In YOUTH: Washington Clinical CenterNational Institute Of Diabetes And Digestive And Kidney Diseases2008–2011
- Phase II Multiple-Dose Treatment Of Type 1 Diabetes MellitusNational Center For Research Resources2007
- Diabetes Evaluation In Washington (Dew-It) Clinical Cen*National Institute Of Diabetes And Digestive And Kidney Diseases2003–2007
- Phase II Multiple-Dose Treatment Of Type 1 Diabetes Mellitus With Ala-AlaNational Center For Research Resources2006
Viewing the full profile is available to verified healthcare professionals only.
Find your profile and take control of your online presence: