Our commitment is to our patients.
Physicians
Physicians

Mark A. Greenberger, MD
Mark A. Greenberger, MD
Mark A Greenberger, M.D. is board certified in Internal Medicine and has been practicing in Highland Park and Lake Forest since 1990. He completed his residency in Internal Medicine at Rush University Medical Center in 1989 and received his Doctor of Medicine at the University Of Illinois College of Medicine in Chicago in 1986. He graduated from Colorado College in 1981 and Highland Park High School in 1977.
Dr. Greenberger completed his most recent term as Chief of the Department of Medicine at Northwestern Lake Forest Hospital in 2016. He previously served as Chairman and Vice Chairman of the Department of Medicine of Lake Forest Hospital.
Dr. Greenberger is a member of the American Medical Association, American College of Physicians, Illinois State Medical Society, and Lake County Medical Society.

David A. Smiley, MD
David A. Smiley, MD
Dr. Smiley received his Bachelor of Science in teaching of biology from the University of Illinois Urbana-Champaign and his Doctor of Medicine at the Medical College of Wisconsin. He completed his internship and residency training through Northwestern University at Evanston Hospital. He has been practicing general Internal Medicine since 2006.
Dr. Smiley is board certified in Internal Medicine. He is a member of the American Medical Association, American College of Physicians, Illinois State Medical Society and Lake County Medical Society. He is a Senior Clinician Educator at University of Chicago Pritzker School of Medicine and Health System Clinician at Northwestern Feinberg School of Medicine. Dr. Smiley served as Vice-Chief of the Department of Medicine at Northwestern Lake Forest Hospital from 2012-2016 and currently serves as Chief of Medicine at Northwestern Lake Forest Hospital since 2016.
Dr. Smiley is married and has three children. When not practicing medicine, he enjoys spending time with his family, running and biking.
Locations
Locations
Highland Park Office
Address: 480 Elm Place
Suite 203
Highland Park, IL 60035
Phone: (847) 433-0404
Fax: (847) 433-1389
Lake Forest Office – Under Construction
Opening Winter 2019
Address: 900 North Westmoreland
Suite 104
Lake Forest, IL 60045
Phone: (847) 234-2488
Fax: (847) 433-1389
Highland Park Office
Suite 203
Highland Park, IL 60035
Phone: (847) 433-0404
Fax: (847) 433-1389
Lake Forest Office (Coming Winter 2019)
Address: 900 North Westmoreland
Suite 104
Lake Forest, IL 60045
Phone: (847) 234-2488
Fax: (847) 433-1389