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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. Michael Bayer:

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Specialties & Research

Dr. Michael Bayer, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Bayer graduated from Universitatea De Medicina Si Farmacie Carol Davila, Bucharest.


Dr. Bayer has 8 hospital affiliations:

  • Lenox Hill Hospital 
  • Beth Israel Medical Center Petrie Division 


  • German
  • Chinese
  • French
  • Spanish
  • Italian
  • Romanian
  • Russian
  • English

> > > > Dr. Michael Bayer, MD

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