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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).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Jay Merker is Excellent. Dr. Merker has been reviewed by 11 patients who have provided 3 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.9
Promptness 3.9
Courteous Staff 3.7
Accurate Diagnosis 4.3
Bedside Manner 4.3
Spends Time with Me 4.3
Follows Up After Visit 4.2

Specialties & Research

Dr. Jay Merker, 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. Merker graduated from University of Guadalajara, Mexico, San Antonio. He has 1 awards.

Patients' Choice Award (2011, 2014)


Dr. Merker has 9 hospital affiliations:

  • North Shore University Hospital 
  • North Shore/Long Island Jewish Hospital System - Franklin Hospital Med Ctr 


  • English
  • Spanish

> > > > Dr. Jay Merker, MD

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Additional Information
Dr. Jay G Merker MD is a male Internist, has 28 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. Jay G. Merker practice?
Dr. Jay Merker has 1 office location.
Dr. Jay Merker practices Internal Medicine and Gastroenterology near Great Neck, NY.
See Great Neck Internists and Great Neck Gastroenterologists.