Find Allergist Near: Waterloo Evansdale Allergist Gilbertville Allergist Raymond Allergist Hudson Allergist La Porte City Allergist Buckingham Allergist Cedar Falls Allergist Jesup Allergist Dunkerton Allergist Mount Auburn Allergist Local Results for Allergy, Asthma & Immunology Cedar Valley Center for ENT, Sinus & Allergy Call Today View Phone Click to View Phone David J. Congdon, MD, FACS View Phone Click to View Phone Don't Know Who to Call? Searching for a qualified allergy, asthma & immunology in your area? Call Us for Assistance: 1- Unfortunately, no results were found for your request. Please try again.