A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).
Our records indicate this doctor is retired.
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Specialties & Research
Dr. Frederick Ruben, MD is board certified in Internal Medicine and Infectious Disease.
He has special expertise in 7 Areas, including AIDSHIV Acquired Immunodeficiency Syndrome, Pregnancy Complications, Infectious, and Pulmonary Tuberculosis.4 more special expertise areas
More Specialties & Research
Education & Awards
Dr. Ruben graduated from Duke University , Durham.More Education & Awards