Browse Health
Gastroenterologist (digestive)
46 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).

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Specialties & Research

Dr. William Collins, MD is board certified in 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. Collins graduated from Indiana University , Indianapolis.


Dr. Collins has 4 hospital affiliations:

  • St. Joseph Hospital - Orange 
  • St. Joseph Hospital Affiliated Physicians 


  • Chinese
  • German
  • Mandarin

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Additional Information
Dr. William Joseph Collins MD is a male Internist, has 46 years of experience and practices in Gastroenterology.
Where does Dr. William J. Collins practice?
Dr. William Collins has 1 office location.
Dr. William Collins practices Gastroenterology near Orange, CA.
See Orange Gastroenterologists.