Merle L. Diamond, MD, joined the staff of the Diamond Headache Clinic, Chicago, Illinois, in 1989 after serving as an attending physician and clinical instructor at Northwestern Memorial Hospital, also in Chicago, and as an attending physician at Evanston and Presence Saint Francis Hospitals, both in Evanston, Illinois. Dr Diamond is currently an attending physician in internal medicine and director of the Diamond Headache Inpatient Unit. She is a clinical assistant professor, Department of Medicine, Rosalind Franklin University of Medicine and Science/Chicago Medical School. Also, she is a Lecturer in the Department of Medicine (Neurology), Loyola University Chicago Stritch School of Medicine. Dr. Diamond received her medical education from Northwestern University Feinberg School of Medicine in Chicago. She completed residencies in emergency medicine/internal medicine at the McGaw Medical Center of Northwestern University. She received subspecialty certification for headache medicine from the United Council for Neurologic Subspecialties. A former fellow of the American College of Emergency Physicians she is currently a Diplomate of the American Board of Internal Medicine. Dr Diamond has contributed numerous articles to the medical literature and has lectured extensively on various headache subjects, particularly the treatment of headache in the emergency department, and regarding hormones and headaches. With Glen D. Solomon, MD, she co-edited Diamond and Dalessio's The Practicing Physician's Approach to Headache, 6th edition (1999). Dr. Diamond is the 2017 recipient of the Lifetime Achievement Award of the National Headache Foundation. She was the course director for a live CME meeting, "Headache Update", held in July 2017.