Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Gregory K Mayer, MD

Individual provider Hematology & Oncology Physician · NPI 1881678191

Dr. Gregory K Mayer, MD is a Hematology & Oncology Physician in Phoenix, Arizona. Licensed in Arizona. Registered with an NPI since 2005.

Licensed in
AZ
In the registry since
2005
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
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

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 16856 (AZ)

Record details

NPI number1881678191
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 30, 2005
Last updated in NPPESOctober 30, 2007

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