She attended medical school at Rush Medical College. Dr. Kosik's areas of expertise include the following: breast cancer surgery, thyroid surgery, and parathyroid surgery. She accepts Blue Cross/Blue Shield, Coventry, and TRICARE, as well as other insurance carriers. She speaks Spanish. Dr. Kosik's professional affiliations include Adventist Health Partners (AHP), Adventist Medical Center Hinsdale, and Adventist Medical Center La Grange.