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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. Douglas Fiero:

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Specialties & Research

Dr. Douglas Fiero, MD is board certified in Internal Medicine.

Education & Awards

Dr. Fiero graduated from State University of New York at Buffalo.


Dr. Fiero has 8 hospital affiliations:

  • Beth Israel Deaconess Hospital - Needham Campus, Inc.L CORP 
  • Beverly Hospital 


  • Chinese
  • Spanish
  • French
  • Italian
  • Portuguese
  • Greek

> > > > Dr. Douglas Fiero, MD

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Additional Information
Dr. Douglas Carl Fiero MD is a male Internist, has 45 years of experience and practices in Internal Medicine.
Where does Dr. Douglas C. Fiero practice?
Dr. Douglas Fiero has 3 office locations.
Dr. Douglas Fiero practices Internal Medicine near Boston, MA.
See Boston Internists.