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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. Gustav Decker:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. Gustav Decker is Excellent. Dr. Decker has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
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. Gustav Decker, MBBS, 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. Decker graduated from University Of The Witwatersrand, Parktown.


Dr. Decker has 3 hospital affiliations:

  • Mayo Clinic Hospital 
  • Owatonna Hospital, Owatonna, Mn 
  • Mayo Clinic - Scottsdale 

> > > > Dr. Gustav Decker, MBBS, MD

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Additional Information
Dr. Gustav Anton George Decker MBBS and MD is a male Internist, has 19 years of experience and practices in Gastroenterology.
Where does Dr. Gustav A. Decker practice?
Dr. Gustav Decker has 1 office location.
Dr. Gustav Decker practices Gastroenterology near Phoenix, AZ.
See Phoenix Gastroenterologists.