Meet Hoag's Metabolism & Weight Management Team
Physicians and Leadership
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David T. Ahn, MD
- Endocrinologist
- Dr. Kris V. Iyer Endowed Chair in Diabetes Care
- Chief of Diabetes Services at Hoag
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Kris V. Iyer, M.D., F.A.C.P., F.A.C.E
- Senior Vice President & Chief Physician Development Officer
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Diana W. Zhao, MD
- Endocrinologist / Obesity Medicine
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Karen Engelman
- Director, Diabetes Center
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Christine Miller
- Front Office Supervisor
Clinical Staff
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Kirsten Bohrnell, R.D., C.D.C.E.S.
- Registered Dietitian
- Certified Diabetes Care & Education Specialist
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Meghan Gonzalez, RD, CDCES
- Certified Diabetes Care and Education Specialist
- Registered Dietitian
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Ruth Hwang, P.A.-C.
- Physician Assistant
- Endocrinology
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Julia Murphy, P.A.-C.
- Physician Assistant
- Endocrinology
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Elizabeth Vitale, MS, RD, CDCES
- Certified Diabetes Care and Education Specialist
- Registered Dietitian
- Training in Adult Weight Management
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Valerie Wolf, B.S.N., R.N., R.D., C.D.C.E.S.
- Registered Nurse
- Registered Dietitian
- Certified Diabetes Care & Education Specialist
- Research Coordinator
Support Staff
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Martha Castelan
- Medical Assistant
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Itzel Garcia Vasquez
- Medical Assistant
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Violet Marquez
- Medical Assistant
Research Coordinators
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Brittany Dennis, M.S.
- Research Coordinator
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Valerie Wolf, B.S.N., R.N., R.D., C.D.C.E.S.
- Registered Nurse
- Registered Dietitian
- Certified Diabetes Care & Education Specialist
- Research Coordinator