- Clinical Professor of Medicine | Director of the Allergy & Sinus Center
- Adult Allergy
- Albert Einstein College of Medicine
- Massachusetts General Hospital, Boston, MA
- National Cancer Institute, Immunology Branch
- Asthma & Immunology
- Internal Medicine
Dr. Ein is a US News & World Report ‘Top Doctor’ and in Castle Connolly's estimation, is among the top 1% in the nation in allergy & sinus!