After graduating Magna Cum Laude from Loyola University, Dr. Rotnicki went on to earn his medical degree from Midwestern University, where he also completed his gastroenterology fellowship.  Dr. Rotnicki is board certified in gastroenterology; he is a fellow of the American College of Gastroenterology.  

Dr. Rotnicki established his practice in the Morris and Joliet areas in 1994 after practicing for 2 years with Dr. Bedford in Morris.  Dr. Rotnicki is on staff at Morris Hospital, Presence St. Joseph Medical Center, and Silver Cross Hospital.  He performs out-patient endoscopies at Morris Hospital, Amsurg, and Presence St. Joseph Medical Center.

Dr. Rotnicki practices general gastroenterology with an emphasis on Inflammatory Bowel Disease and the treatment of Barrett's Esophagus.