He attended medical school at Northwestern University, Feinberg School of Medicine. His areas of expertise include the following: hay fever (allergic rhinitis), infections, and asthma. Dr. Knysak accepts Blue Cross/Blue Shield, Coventry, and TRICARE, as well as other insurance carriers. Dr. Knysak is affiliated with Northwestern Medicine Central DuPage Hospital and Adventist Medical Center Hinsdale. He has an open panel.