Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Marion Edwyn Harrison III, MD

Individual provider Gastroenterology Physician · NPI 1801873633

Dr. Marion Edwyn Harrison III, MD is a Gastroenterology in Scottsdale, Arizona. Graduated from University of Virginia School of Medicine in 1985, 41 years ago. Practices with Mayo Clinic Arizona, a 1,616-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona and Minnesota.

Years since qualifying
41
Trained at
University of Virginia School of Medicine
Licensed in
AZ, MN
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

13400 E Shea Blvd
Scottsdale, AZ 85259-5404
Phone: (480) 301-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 21372 (AZ)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 35930 (MN)

Record details

NPI number1801873633
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 22, 2005
Last updated in NPPESMarch 7, 2023
Certification dateMarch 7, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Mayo Clinic Arizona — 1616 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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