Meet Hoag's Diabetes Team

David T. Ahn, MD

• Endocrinologist
• Dr. Kris V. Iyer Endowed Chair in Diabetes Care
• Chief of Diabetes Services at Hoag

Kris V. Iyer, M.D., F.A.C.P., F.A.C.E

• Senior Vice President & Chief Physician Development Officer

Diana W. Zhao, MD

• Endocrinologist / Obesity Medicine

Karen Engelman

• Director, Diabetes Center

Christine Miller

• Front Office Supervisor

Jonathan Huang, MD

• Endocrinologist

Kirsten Bohrnell, R.D., C.D.C.E.S.

• Registered Dietitian
• Certified Diabetes Care & Education Specialist

Cristi Bristol, BSN, RN, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Nurse

Michelle Connell, RN, CDCES

• Certified Diabetes Care and Education Specialist

Meghan Gonzalez, RD, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Dietitian

Ruth Hwang, P.A.-C.

• Physician Assistant
• Endocrinology

Julia Murphy, P.A.-C.

• Physician Assistant
• Endocrinology

David Pham, PharmD, BCPS, CDCES, BC-ADM, APh

• Diabetes Pharmacist
• Certified Diabetes Care and Education Specialist

Michelle Speetzen, BSN, RN, CDCES

• Registered Nurse
• Certified Diabetes Care and Education Specialist
• Inpatient Diabetes Educator

Amanda Tran, PharmD, BCACP, APh, CDCES

• Ambulatory Care Pharmacist
• Certified Diabetes Care and Education Specialist

Elizabeth Vitale, MS, RD, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Dietitian
• Training in Adult Weight Management

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

Martha Castelan

• Medical Assistant

Itzel Garcia Vasquez

• Medical Assistant

Violet Marquez

• Medical Assistant

Brittany Dennis, M.S.

• Research Coordinator

David Mina, M.P.H., C.D.C.E.S.

• Health & Wellness Program Coordinator

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