Doctor Profile Request an Appointment Location: DRH Health Allergy Ear, Nose and Throat Address: 1401 Duncan Regional Loop Road Duncan, OK 73533 Phone: (580) 252-0100 Fax: (580)-252-0106 John McGath MD Allergy, Ear/Nose/Throat, Otolaryngology Surgery DRH Health Allergy Ear, Nose and ThroatDuncan Regional Hospital Community: Duncan Board Certification American Board of Otolaryngology Medical School Creighton University Residency Madigan Army Medical Center