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License & Identifications

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. John Loeb:

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Patient Reviews

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The overall average patient rating of Dr. John Loeb is Good. Dr. Loeb has been reviewed by 1 patients who have provided 0 comments. The rating is 4 out of 5 stars.

Specialties & Research

Dr. John Loeb, MD is board certified in Internal Medicine.

Education & Awards

Dr. Loeb graduated from Harvard University , Boston.


Dr. Loeb has 6 hospital affiliations:

  • New York Presbyterian Hospital / Columbia 
  • NewYork-Presbyterian / Weill Cornell 


  • Spanish

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Additional Information
Dr. John N Loeb MD is a male Internist and practices in Internal Medicine.
Where does Dr. John N. Loeb practice?
Dr. John Loeb has 1 office location.
Dr. John Loeb practices Internal Medicine near New York, NY.
See New York Internists.