Dr. Klein (or staff) speaks German and French. These areas are among Dr. Klein's clinical interests: sinusitis (sinus infection), drug allergy, and hay fever (allergic rhinitis). His professional affiliations include Riddle Hospital and Crozer-Keystone Health System. After attending Albany Medical College for medical school, he completed his residency training at Long Island Jewish Medical Center. Patient reviews placed him at an average of 4.5 stars out of 5. Dr. Klein honors United Healthcare Platinum, United Healthcare Compass, and United Healthcare Navigate, as well as other insurance carriers. Distinctions awarded to Dr. Klein include: "Top Doctor" in Asthma and Allergy, Main Line Today; Top Allergist and Immunologist awarded by HealthTap; and Philadelphia Super Doctors. Dr. Klein's practice is open to new patients.