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

Individual provider Radiation Oncology Physician · NPI 1538346606

William Gary Rule, MD is a Radiation Oncology in Phoenix, Arizona. Graduated from Oregon Health Sciences University School of Medicine in 2006, 20 years ago. Practices with Mayo Clinic Arizona, a 1,616-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona.

Years since qualifying
20
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
AZ
In the registry since
2008
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

5777 E Mayo Blvd Dept OF Radiation Oncology
Phoenix, AZ 85054-4502
Phone: (480) 301-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 44461 (AZ)

Record details

NPI number1538346606
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 30, 2008
Last updated in NPPESSeptember 8, 2020
Certification dateSeptember 8, 2020

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 2006 (20 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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