He studied medicine at the University of Wisconsin School of Medicine and Public Health. Dr. Cornfield's areas of expertise include the following: bladder cancer, benign prostatic hyperplasia (enlarged prostate), and kidney stones. Patients gave him an average rating of 4.5 stars out of 5. He honors Blue Cross/Blue Shield, Coventry, and TRICARE, in addition to other insurance carriers. Dr. Cornfield is professionally affiliated with Adventist Medical Center Hinsdale, Adventist Medical Center La Grange, and Adventist Health Network (AHN).