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Riverside Medical Group
    Meet our Medical Staff    

Click here to view the staff's individual work schedules.

Dr. Yechiel N. Berkowicz Yechiel N. Berkowicz, M.D.
Dr. Berkowicz received his medical degree from the University of Illinois Medical School. He is a member of the Phi Kappa Phi, Psi Chi, and Phi Eta Sigma Honor Societies. Dr. Berkowicz completed his residency at Lutheran General Hospital. He is Board Certified in Internal Medicine. Dr. Berkowicz has received an AMA Physician Recognition Award and has previously served as Past President of the Buffalo Grove Chapter of the American Cancer Society. He is a Member of the American Society of Internal Medicine and the American College of Physicians. His personal interests include Krav_Maga and Karate. 
Dr. Daniel L. Goldstein Daniel L. Goldstein, M.D.
Dr. Goldstein received his medical degree from Indiana University School of Medicine. He is a member of the Phi Beta Kappa and Phi Eta Sigma Honor Societies. Dr. Goldstein completed his residency at Lutheran General Hospital. He is Board Certified in Internal Medicine. Dr. Goldstein enjoys skiing with his family, exercising, reading novels, and is a big fan of the Chicago Bears and Indiana University basketball. 
Dr. Michael L. Mangurten Michael L. Mangurten, M.D.
Dr. Mangurten received his medical degree from the University of Illinois Medical School. He completed his residency at Lutheran General Hospital. Dr. Mangurten is Board Certified in Internal Medicine. He served as a clinical instructor at the University of Illinois College of Medicine, University of Chicago Medical School, and the Chicago Medical School. Dr. Mangurten's personal interests include running, cycling, golfing, the Chicago White Sox, and Illinois college football and basketball. 
Dr. James D. Pride James D. Pride, M.D.
Dr. Pride received his medical degree from the University of Illinois Medical School. He completed his residency at Lutheran General Hospital. Dr. Pride is Board Certified in Internal Medicine. He has received an AMA Physician Recognition Award. Dr. Pride also serves as an FAA medical examiner. His personal interests include golf and tennis. 
Dr. Eric J. Yegelwel Eric J. Yegelwel, M.D.
Dr. Yegelwel received his medical degree from the New Jersey Medical School. He completed his residency at the University of Illinois Hospital. Dr. Yegelwel completed a Fellowship in Gastroenterology at the Loyola University Medical Center/Hines Veterans Administration Hospital. He is Board Certified in Internal Medicine and Gastroenterology. Dr. Yegelwel is the Chief of the Gastroenterology Section at Northwest Community Hospital. He has authored two articles in The American Journal of Gastroenterology and The Journal of Digestive Diseases and Sciences. Dr. Yegelwel enjoys running, reading, taking trips with his family, and walking his dog. 
Dr. Diane M. Flershem Diane M. Flershem, M.D.
Dr. Flershem received her medical degree from Rush Medical College. She completed her internal medicine residency at Northwestern Memorial Hospital. She also studied anesthesiology at New York Hospital-Cornell University. Dr. Flershem is Board Certified in Internal Medicine. She has earned an Honors College Scholarship for Research Investigation and is an author of one article published in Lancet. Dr. Flershem received the Patients Choice Award in 2008, 2009 and 2010. Only 4-5% of doctors nationwide receive this award. She also received the Compassionate Doctor Award for 2010 where only 3% of nation's physicians were honored. Dr. Flershem loves zoos, her two dogs, and going on trips to New York and Arizona with her friends. 
Dr. Mary Raymond Mary Raymond, M.D.
Dr. Raymond received her medical degree from Rush Medical College. She completed her internal medicine residency at Evanston Northwestern and studied one year in surgery at Stony Brook University in New York. Dr. Raymond is Board Certified in Internal Medicine. Since 2008, she has served as a hospitalist at Alexian Brothers Hospital in Elk Grove Village, Illinois. In her free time, Mary enjoys outdoor activities such as golf, tennis, skiing, and walking her dog. 
Erin Olsen Erin Olsen, P.A.-C
Erin Olsen is a Certified Physician Assistant and a graduate of the Philadelphia College of Osteopathic Medicine Physician Assistant Program. She received her Bachelor of Science degree from Lycoming in Pennsylvania. Erin is a skilled professional trained to take medical histories, perform physical exams, diagnose and treat ilnesses, order and interpret lab tests. Besides being a huge Philadelphia Eagles fan, she enjoys swimming and sailing in her free time. 
Mallory Fillmore Mallory Fillmore, P.A.-C
Mallory Fillmore is a Certified Physician Assistant and a graduate of Midwestern University. She received her Bachelor of Science degree from Luther College in Decorah, Iowa and graduated Summa Cum Laude. In her free time, Mallory loves cooking and experimenting in her kitchen, learning about nutrition, and going to hot yoga. 

MEDICAL STAFF DIRECTORY
Yechiel N. Berkowicz, M.D.
Daniel L. Goldstein, M.D.
Michael L. Mangurten, M.D.
James D. Pride, M.D.
Eric J. Yegelwel, M.D.
Diane M. Flershem, M.D.
Mary Raymond, M.D.
Erin Olsen, P.A.-C
Mallory Fillmore, P.A.-C

 

 

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