New Search Irfan W Hassen M.D. (301) 698-2604 Primary Specialties Family Medicine Department Medicine Additional Languages Spoken English Primary Office Address: 801 Toll House Ave, #D-2 Frederick, MD 21701 Phone: (301) 698-2604 Recommend this Physician Get Directions Education Medical School - University of Colombo-Sri Lanka Internship - General Hospital, Ratnapura Internship - Altoona Hospital Residency - Altoona Hospital Board Certifications Grandfathered MS Bylaws