Joel Retsky, MD, a gastroenterologist at Endeavor Health, specializes in inflammatory bowel disease, including Crohn’s disease and ulcerative colitis, as well as colonoscopy for colon cancer screening. He completed advanced training at the University of Chicago and served on faculty before joining community-based practice. Dr. Retsky is committed to delivering the same level of care he would want for his own family. Dr. Retsky is rated as a Distinguished provider by MediFind in the treatment of Colitis. His top areas of expertise are Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, Endoscopy, and Colonoscopy.

Rahul Modi is a primary care provider, practicing in Family Medicine in Glenview, Illinois. Dr. Modi is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Mixed Gonadal Dysgenesis, Turner Syndrome, Perrault Syndrome, and Osteomyelitis in Children.

Shailesh Bajaj, MD, a gastroenterologist at Endeavor Health, has been caring for patients for more than 17 years. He treats a wide range of digestive conditions, including cancers of the GI tract, and embraces new modalities that improve patient outcomes and comfort. Dr. Bajaj believes in treating every patient with the same care and respect he would offer his own family. Dr. Bajaj is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Cholangitis, Sclerosing Cholangitis, Bile Duct Obstruction, Gastrectomy, and Pancreatectomy.

Lesley Rhee, MD, a gastroenterologist at Endeavor Health, evaluates and treats conditions affecting the digestive system, including the esophagus, stomach, intestines and liver. She provides diagnostic procedures and therapeutic care to support patients in managing gastrointestinal health. Dr. Rhee is rated as an Advanced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Familial Adenomatous Polyposis, Gardner Syndrome, Hemorrhoids, Endoscopy, and Gastrectomy.

Omar Khan, MD, a gastroenterologist at Endeavor Health, specializes in inflammatory bowel disease, including Crohn’s disease, ulcerative colitis and hereditary colorectal cancer syndromes. He takes a personal, team-based approach to care, helping patients manage their condition through all stages of health. Dr. Khan is also passionate about advancing predictive tools to better match treatments with individual needs. Dr. Khan is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Hemorrhagic Proctocolitis, Ulcerative Colitis, Crohn's Disease, Gastrectomy, and Endoscopy.

Jeffrey Nathanson is a Gastroenterologist in Northbrook, Illinois. Dr. Nathanson is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Irritable Bowel Syndrome (IBS), Heartburn, Gas Bloat Syndrome, Endoscopy, and Gastrectomy.

Gene Chiao is a Pharmacologist and a Gastroenterologist in Northbrook, Illinois. Dr. Chiao is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Irritable Bowel Syndrome (IBS), Heartburn, Benign Esophageal Stricture, Colonoscopy, and Gastrectomy.

Frank Martini is a Gastroenterologist in Lake Forest, Illinois. Dr. Martini has been practicing medicine for over 44 years and is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Diverticular Disease, Visceromegaly, Collagenous Colitis, Endoscopy, and Gastrectomy.

Alexander Tosiou is a Gastroenterologist in Lake Forest, Illinois. Dr. Tosiou has been practicing medicine for over 33 years and is rated as an Advanced provider by MediFind in the treatment of Colitis. His top areas of expertise are Lower Esophageal Ring, Benign Esophageal Stricture, Diarrhea, Gastrectomy, and Endoscopy.

Matthew Tick, DO, a gastroenterologist at Endeavor Health, treats patients with a wide range of digestive disorders and embraces innovation to improve care. He values getting to know his patients and ensuring they feel heard, informed and empowered throughout their treatment journey. Dr. Tick is particularly interested in new GI therapies and technologies that offer more effective options for healing. Dr. Tick is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Hemorrhoids, Familial Adenomatous Polyposis, Turcot Syndrome, Endoscopy, and Colonoscopy.

John M. Sultan, MD, an internal medicine physician at Endeavor Health, provides primary care for adults with an emphasis on integrative medicine. He combines conventional treatments with evidence-based complementary approaches to support patients’ overall health and long-term wellbeing. Dr. Sultan is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Irritable Bowel Syndrome (IBS), Chronic Cough, Coronary Heart Disease, and Atrioventricular Nodal Reentrant Tachycardia (AVNRT).

Kenneth Breger, MD, an internal medicine physician at Endeavor Health, provides primary care for adults with a focus on prevention and long-term relationships. With nearly 30 years of experience, he values continuity of care and generational connections with families. Dr. Breger also supports lifestyle change and early detection to help patients stay healthy and independent over time. Dr. Breger is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Alzheimer's Disease, Chronic Cough, Large-Cell Immunoblastic Lymphoma, and Vertigo.

Kimberly Schaefer, MD, an internal medicine physician at Endeavor Health, provides primary care for adults with a focus on prevention, education and long-term relationships. She works closely with patients to create care plans based on evidence-based guidelines and personal goals. Dr. Schaefer values trust, communication and continuity of care. Dr. Schaefer is rated as an Experienced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Diarrhea, Trichohepatoenteric Syndrome, Childhood Iron Deficiency Anemia, and Large-Cell Immunoblastic Lymphoma.

Gary Kaufman, MD, an internal medicine physician at Endeavor Health, provides primary care for adults with a focus on prevention and long-term relationships. He cares for generations of families and emphasizes continuity, trust and patient education. Dr. Kaufman values building partnerships that support lifelong health and wellbeing. Dr. Kaufman is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and Non-Hodgkin Lymphoma.

Matthew Snowdon, DO, an internal medicine physician at Endeavor Health, provides care for adult patients across a broad range of health concerns. His approach emphasizes long-term relationships and empowering patients to take ownership of their health. With a personal history of navigating the healthcare system as a cancer patient in childhood, Dr. Snowdon brings firsthand perspective to helping patients feel informed, supported and comfortable. He values communication and education as key to achieving meaningful health outcomes. Dr. Snowdon is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Sitosterolemia, Obesity, High Cholesterol, and Obesity in Children.

Arielle Levitan, MD, an internal medicine physician at Endeavor Health, provides primary care for adults across all stages of life. She emphasizes continuity of care, patient partnerships and personalized health planning. Her clinical interests include preventive medicine, chronic disease management and helping patients navigate healthcare decisions with evidence-based support. Dr. Levitan is rated as an Experienced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Sitosterolemia, Familial Neurocardiogenic Syncope, Hypothyroidism, and Varicose Veins.

Daniel Goldstein is a primary care provider, practicing in Internal Medicine in Highland Park, Illinois. Dr. Goldstein is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Heart Failure, Hypertension, Familial Hypertension, Heart Transplant, and Lung Transplant.

Monika Krezalek, MD, a colorectal surgeon at Endeavor Health, specializes in minimally invasive and robotic techniques to treat colon and rectal cancer, inflammatory bowel disease, diverticulitis and benign anorectal conditions. She leads the nationally accredited Rectal Cancer Program at Endeavor Health, where she collaborates with a multidisciplinary team to deliver comprehensive, coordinated care. Dr. Krezalek is committed to advancing surgical innovation to improve recovery for patients and is dedicated to advancing excellence in colorectal surgery and cancer care. Dr. Krezalek is rated as an Experienced provider by MediFind in the treatment of Colitis. Her top areas of expertise are Rectal Prolapse, Hemorrhoids, Familial Colorectal Cancer, Bladder Reconstruction, and Small Bowel Resection.

Mark Greenberger is a primary care provider, practicing in Internal Medicine in Highland Park, Illinois. Dr. Greenberger is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Acute Interstitial Pneumonia, Myeloproliferative Neoplasms (MPN), Heart Failure with Preserved Ejection Fraction (HFpEF), Endoscopy, and Pacemaker Implantation.

David Smiley is a primary care provider, practicing in Internal Medicine in Highland Park, Illinois. Dr. Smiley is rated as an Experienced provider by MediFind in the treatment of Colitis. His top areas of expertise are Bronchiectasis, Philadelphia-Negative Chronic Myeloid Leukemia, Chronic Myelogenous Leukemia (CML), and Childhood Acute Myeloid Leukemia.