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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 (2)

The overall average patient rating of Dr. John Vierling, Gastroenterologist, Hepatologist is Good. Dr. Vierling has been reviewed by 6 patients who have provided 2 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.6
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Vierling, MD is board certified in Gastroenterology.

  • He has special expertise in 14 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Bile Duct inflammation (Cholangitis)
  • Constipation
  • Gilbert Disease
  • Hepatic Encephalopathy
  • Hepatitis
  • Hepatitis C
  • Hepatocellular Carcinoma
  • Irritable Bowel Syndrome (IBS)
  • Liver Cirrhosis
  • Liver Cirrhosis (Biliary)
  • Liver Diseases
  • Liver Transplantation
  • Ulcerative Colitis

Education & Awards

Dr. Vierling graduated from Stanford University. He has 3 awards.

One of America's Leading Experts on:
Biliary Liver Cirrhosis
Liver Transplantation
Castle Connolly America's Top Doctors® (2002 - 2008, 2010 - 2015)


Dr. Vierling has 6 hospital affiliations:

  • St Luke's Episcopal Hospital 
  • The Methodist Hospital 


  • German
  • Spanish

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Additional Information
Dr. John M Vierling MD is a male Internist, has 39 years of experience and practices in Gastroenterology and Hepatology.
Where does Dr. John M. Vierling practice?
Dr. John Vierling has 1 office location.
Dr. John Vierling practices Gastroenterology and Hepatology near Houston, TX.
See Houston Gastroenterologists and Houston Hepatologists.