Posted in Web Dr. Gregory Yanik, Pediatric Hematologist-Oncologist in … June 24, 2019 Dr. Gregory Yanik is a Pediatric Hematologist-Oncologist in Ann Arbor, MI. Find Dr. Yanik’s phone number, address, insurance information, hospital affiliations and more. : https://health.usnews.com/doctors/gregory-yanik-495045