Hahn Pediatric Group Back to Search Hahn Pediatric Group Categories Health Care 18210 S. La Grange Rd., Suite 205 , Tinley Park , IL , 60487 (708) 478-7800 Send Email http://www.hpgkids.com About Pediatric physicians. Contacts Primary Gene Denning D.O. Share × Print Email Facebook LinkedIn X Pinterest Powered By GrowthZone