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About Us
Chris K. Guerin, M.D., F.A.C.E
Dr. Guerin was born and raised in Chicago, Illinois.  He completed his medical education at Loyola University School of Medicine in Maywood, Illinois and internship and residency in Internal Medicine at the world-renowned Mayo Clinic in Rochester, Minnesota.  Dr. Guerin completed his subspecialty training in Endocrinology, Diabetes, and Metabolism at the Mayo Clinic
 
Derek D. Mafong, M.D.
A native of San Diego, Dr. Mafong attended college at the University of California, Los Angeles.  He subsequently completed his medical education at the University of California, San Francisco and residency training in  Internal Medicine at Case Western School of Medicine in Cleveland, Ohio.  Dr. Mafong completed subspecialty training in Endocrinology, Diabetes,
before moving to San Diego.  He continued his research interests while in San Diego by completing a Post-Doctoral Scholarship sponsored by the National Institutes of Health (NIH) at UCSD.  Dr. Guerin is board certified in Endocrinology and Metabolism, Internal Medicine, and Lipidology.
 
 Dr. Guerin has been serving the North County since 1983.  He previously served as Chief of the Division of Internal Medicine and Chair of the Department of Medicine at Tri-City Medical Center (TCMC).  Currently, Dr. Guerin serves as Medical Director for Diabetes Education Services and the Diabetes Service Line at TCMC.  He continues to be actively involved in patient and physician education and clinical research.
 
Dr. Guerin is a Charter Member of the Fellows of the American Association of Clinical Endocrinologists and the Endocrine Society.  He is also a member of the Professional Section of the American Diabetes Association, the National Lipid Association, the San Diego County Medical Association, and the Mayo Alumni association.  His dedication to diabetes has been recognized with an American Diabetes Association’s Provider Recognition Award, with distinction.
 
Dr. Guerin is married with two children.  He enjoys outdoor activities with his family including camping and windsurfing.  He has a strong family history of diabetes and heart disease.  In fact, his father died of complications from diabetes at age 51; his grandfather died at a young age and also had diabetes.  In his practice, he encourages his patients to incorporate good dietary choices and increased exercise for improved health. 
and Metabolism at the University of California, San Diego where he trained with some of the most renowned experts in the field.  During this time, Dr. Mafong actively participated in numerous clinical research studies in the field of diabetes.
 
Dr. Mafong is an Assistant Clinical Professor at UCSD where he continues his interest in teaching medical students and volunteers as a Diabetes specialist at the UCSD free-clinic for the homeless in Pacific Beach.  He is a member of the Endocrine Society, American Association of Clinical Endocrinologists, American Diabetes Association, and American Medical Association.
 
Dr. Mafong lives in San Diego with his wife, Amy, and they both enjoy outdoor activities and going to Padres games.  Dr. Mafong is fluent in Spanish. 
 
 

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