Dr. Nguyen is boarded in Internal Medicine, Hypertension, Obesity and Endocrinology, Diabetes and Metabolism. He specializes in diabetes, hypertension, metabolic syndrome, nutrition and obesity and all aspects of thyroid disease diagnosis and treatment. He is actively and passionately involved in the teaching of future physicians and is currently an Adjunct Associate Professor for Touro University College of Osteopathic Medicine and a Clinical Associate Professor for the Arizona College of Osteopathic Medicine. Dr. Nguyen has published numerous articles in the medical literature and has conducted clinical research in his medical practice. He has won the Patients Choice Award annually since 2008.

Dr. Nguyen is a Fellow of the American College of Physicians (ACP), the American Association of Clinical Endocrinologists (AACE), and The Obesity Society (TOS).