Dr. Isaac Yoon joined Patient First as a staff physician in 1995 and is the Chief Medical Director for all regions. He is currently the Medical Director of the Lutherville, Aberdeen, and Columbia centers. Dr. Yoon received a Bachelor of Arts degree from Johns Hopkins University in Baltimore, Maryland, and he received his medical degree from Tulane University School of Medicine in New Orleans, Louisiana. He completed a residency in internal medicine at the Mayo Clinic in Rochester, Minnesota. Dr. Yoon is board certified by the American Board of Physician Specialties in Family Medicine.