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Internist, Gastroenterologist (digestive)
33 years of experience
Accepting new patients
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 (21)

The overall average patient rating of Dr. William Mello is Average. Dr. Mello has been reviewed by 34 patients who have provided 21 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 3.8
Promptness 3.9
Courteous Staff 3.7
Accurate Diagnosis 3.5
Bedside Manner 3.0
Spends Time with Me 3.2
Follows Up After Visit 3.2

Specialties & Research

Dr. William Mello, 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. Mello graduated from University of Illinois at Chicago.


Dr. Mello has 9 hospital affiliations:

  • Glendale Adventist Medical Center/Adventist Health 
  • Glendale Memorial Hospital and Health Center 


  • Spanish

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Additional Information
Dr. William David Mello MD is a male Internist, has 33 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. William D. Mello practice?
Dr. William Mello has 2 office locations.
Dr. William Mello practices Internal Medicine and Gastroenterology near Glendale, CA.
See Glendale Internists and Glendale Gastroenterologists.