Dr. O Hollaren has one office in Oregon where he specializes in Allergy / Immunology and Allergy Medicine. Learn more.
Dr. O Hollaren works with two doctors including Dr. Barzin Khalili and Dr. Donald Dibbern.
As an allergist / immunologist in Portland, Dr. Mark O Hollaren offers specialized care for allergic reactions and immunological disorders in patients of all ages. Dr. O Hollaren may treat and manage conditions like asthma, hives, and a range of allergic reactions like environmental or food allergies. He may also treat rhinitis & sinusitis, as well as other disorders that affect the body's immune system.
Dr. Mark O Hollaren is trained to provide care for patients in Portland, OR that suffer from allergic reactions and conditions. Dr. O Hollaren may see patients for common symptoms like a sore throat, or may treat patients who deal with the possibility of anaphylaxis and anaphylactic shock as a result of their allergies. Allergists may employ a wide range of diagnostic & treatment, and management techniques.