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).
Learn more about Dr. Eileen Callahan:
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Specialties & Research
Dr. Eileen Callahan, MD is board certified in Internal Medicine and Geriatric Medicine.
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Education & Awards
Dr. Callahan graduated from UMDNJ, Newark. She has 4 awards.
Dr. Callahan has 1 hospital affiliations:
- Mt Sinai Hospital