Read More About Your Health Care Provider in Arlington Heights, IL Below
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 before he became a health care provider in Arlington Heights, IL. 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.
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 before becoming a health care provider in Arlington Heights, IL. 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 received the Castle Connolly Top Doctors award for Internal Medicine for 10 years 2003-2013. Dr. Mangurten’s personal interests include running, cycling, golfing, the Chicago White Sox, and Illinois college football and basketball.
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 Pride is the Vice President of the Jeffrey Pride foundation, which raises money for pediatric cancer research. This is an all-volunteer organization that has raised over 2 million dollars for clinical research. www.jeffreypridefoundation.org
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 served as 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.
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 before continuing on as a health care provider in Arlington Heights, IL. 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.
Jason B. Thalheimer, M.D.
Dr. Thalheimer is a board certified physician, specializing in internal medicine. He grew up locally in Arlington Heights, IL. He travelled downstate for college where he attended the University of Illinois in Champaign. After graduating, he moved on to medical school at Rosalind Franklin University in North Chicago, and then completed his Internal Medicine residency at Lutheran General Hospital. Dr. Thalheimer is a big sports fan and enjoys cheering on Chicago’s teams. His personal interests include playing basketball and softball, attending movies and trivia nights, and reading.
Tyler Kostecki, PA-C
Tyler Kostecki joined our practice in July 2017. He received his Master’s Degree in Physician Assistant Studies from Marquette University. He first received his Bachelor’s Degree in Biological Sciences from Illinois State University, graduating summa cum laude. Tyler’s personal interest include running and cycling along the Lakefront trail, Chicago pro sports (Cubs, Bears, Bulls), ISU football, and Marquette basketball.
Ashley Evans, FNP-BC
Ashley Evans joined our practice in November 2019. She graduated with her Bachelor’s degree from Chamberlain College of Nursing. Her nursing background includes experience in the emergency room, primary care and home health nursing. She then graduated from Herzing University with a 4.0 GPA and master’s degree as an Advanced Practice Registered Nurse in 2017. She is board certified as a Family Nurse Practitioner. Ashley’s passions include swimming, antique hunting and traveling worldwide.
David Rosen, M.D.
Dr. David Rosen earned his medical degree from Rush Medical College in Chicago, Illinois. Subsequently, he completed his residency in internal medicine at Rush University Medical Center and served as Chief Resident at Rush/Rush North Shore Medical Center in Skokie, Illinois. He is board certified in internal medicine. Dr. Rosen then became board-certified in emergency medicine after completing a second residency in Cook County Hospital in Chicago. In 2005, he did a year-long preceptorship in phlebotomy, the study of medicine devoted to vein disease. He is board certified by the American Board of Venous and Lymphatic medicine. In his free time, he enjoys spending time with his wife and 3 kids, reading, cooking, playing the piano and traveling.