Dr. Mark Greenberger is an internal medicine practitioner at the Highland Park Hospital, with a private practice in Lake Forest. He is also affiliated with Northwestern Lake Forest Hospital. Dr. Greenberger works at his Lake Forest office on Tuesdays, and on Mondays, Thursdays and Fridays at his Highland Park Office. The Lake Forest Office is located on the second floor of the McGraw Medical Building, Unit 202. Dr. Greenberger shares an office with Dr. David A. Smiley and Christina Fouse, a certified nurse practitioner. Please call to schedule an appointment.