Gary L. Reschak, MD

Syed W. Haider, MD, affiliated with Northwestern Medicine Regional Medical Group, specializes in internal medicine and hospital medicine in Crystal Lake, IL. Highly rated by patients, Dr. Haider is recognized for his exceptional care, attentiveness, and comprehensive approach to patient needs. With a medical education from the University of Health Sciences Antigua School of Medicine and numerous patient reviews commendatory of his compassionate practice, Dr. Haider ensures a personalized healthcare experience, fostering lasting relationships through open communication and thorough evaluations. He is board-certified by the American Board of Internal Medicine, reflecting his commitment to maintaining high standards in patient care. Generated from the website

Z. Ted Lorenc, MD, is a highly rated physician specializing in internal medicine as part of the Northwestern Medicine Regional Medical Group in Crystal Lake, IL. With a commitment to patient care, Dr. Lorenc delivers thorough, compassionate service, earning a perfect 5.0 rating from patients. Dr. Lorenc's medical education includes an MD from the University of Illinois at Chicago College of Medicine and residency training at the University of Missouri-Columbia. He is board certified in Internal Medicine and actively engages in patient education while maintaining a strong affiliation with Northwestern Medicine's network. Generated from the website

Northwestern Medicine is proud to have five hospitals ranked among “America’s Best,” including Northwestern Memorial Hospital, the only Illinois hospital to be ranked No. 1 for 14 straight years, by U.S. News & World Report, 2025 – 2026. We are leading the quest for better care in the Chicago area and beyond. With more than 200 locations across Chicagoland, better care and better treatments are never far from home. To learn more, visit our website.