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, Columbia, Alexandria and Hamilton 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.