In this podcast, Dr. Thanh Hoang, Program Director NCC Endocrinology Fellowship and an Associate Professor of medicine and Director of Endocrine Division of Uniform Services University Health Sciences, interviews Dr. Angela M Leung, Associate Professor of medicine at UCLA David Geffen School of Medicine and an endocrinologist at greater VA Greater Los Angeles Healthcare System. Their discussion focuses on hypo and hyperthyroidism; how to diagnose and whom to screen. In addition, they discuss guidelines that can help clinicians decide who to screen for hypo/hyperthyroidism and the meaning of serum TSH function tests.