David O. Woodard, MD

David Thomas Giangreco, MD, located in Geneva, IL, is part of the esteemed Northwestern Medicine Regional Medical Group and offers a comprehensive range of medical services, including general surgery and primary care, while prioritizing patient experience and satisfaction. With a blend of expertise from his education and training at distinguished institutions, Dr. Giangreco aims to provide high-quality care tailored to individual patient needs. Patients commend the team's compassion and thoroughness, reflected in a high overall satisfaction rating. Reviews frequently highlight the attentive nature of the staff, as well as their commitment to patient education and clear communication throughout the treatment process. Generated from the website

Northwestern Medicine is proud to have five hospitals ranked among Americas 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.

Avi Mazumdar, MD, located in Winfield, IL, is a highly-rated interventional neuroradiologist affiliated with Northwestern Medicine Regional Medical Group. Dr. Mazumdar is board-certified in diagnostic radiology and neuroradiology, with expertise in treating conditions such as aneurysms, arteriovenous malformations, and strokes. Patients praise Dr. Mazumdar for his thoroughness, clear communication, and compassionate care, with many highlighting his responsiveness and ability to explain complex medical information in a simple and understandable manner. Generated from the website