Meet the Team

David T. Ahn, MD

• Endocrinologist / Bariatrician
• Program Director at the Mary and Dick Allen Diabetes Center

Mackenzie Brewer, RD, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Dietitian

Cristi Bristol, BSN, RN, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Nurse

Karen Engelman

• Manager of Operations

Ellie Fong, PA-C, CDCES

• Certified Physician Assistant

Meghan Gonzalez, RD, CDCES

• Certified Diabetes Care and Education Specialist
• Registered Dietitian

Ruth Hwang, PA-C

• Physician Assistant

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

• Senior Vice President & Chief Physician Development Officer

Samantha Markovitz, NBC-HWC

• Supervisor, Health and Wellness Initiatives

Veronica Merino, LVN

• Licensed Vocational Nurse

Christine Miller

• Front Office Supervisor

Kristen Nguyen, MD

• Endocrinologist

David Pham, PharmD, BCPS, DCES, BC-ADM

• Pharmacist
• Diabetes Care and Education Specialist

Michelle Speetzen, BSN, RN

• Inpatient Diabetes Educator RN

Elizabeth Vitale, RD, CDCES

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

Valerie Wolf, BSN, RN, RD, CDCES

• Research Coordinator
• Certified Diabetes Care and Education Specialist
• Registered Nurse