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DR. GREGORY K MAYER M.D.
NPI 1881678191
Internal Medicine - Hematology & Oncology in Phoenix, AZ

Active since November 30, 2005
5777 E MAYO BLVD, PHOENIX, AZ 85054(480) 301-8000 Get Directions Write a Review

NPPES record last updated: October 30, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Gregory K Mayer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY K MAYER M.D. (NPI 1881678191) is an individual hematology & oncology provider in Phoenix, Arizona, licensed in Arizona (16856) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1881678191
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. GREGORY K MAYERCredential: M.D.
Location Address5777 E MAYO BLVDPhoenix, AZ 85054-4502
Mailing Address5777 E Mayo BlvdPhoenix, AZ 85054-4502 · (480) 301-8000
Phone(480) 301-8000
Sole ProprietorNo
Enumeration DateNovember 30, 2005
Last NPPES UpdateOctober 30, 2007
✔ NPI 1881678191 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in AZ · 16856
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
5777 E MAYO BLVD, Phoenix, AZ 85054
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Other Identifiers 6

Other86080015085054B051AZ · Triwest
OtherP00024542AZ · Rr Medicare
Medicaid269656AZ
Medicare PINZ75142AZ
Other86080015085259A876AZ · Triwest
Medicare UPIND37260

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MEAGAN ELIZABETH TIBBO M.D.
Orthopaedic Surgery
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 515-6296
MISS AMY LETICIA BROWN PA-C
Physician Assistant
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 301-8000
KRISTINA YANCEY
Radiology (Diagnostic Radiology)
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 342-2000
KATHERINE ANNE LESPRON LMSW
Social Worker
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 342-4005
KASSANDRA HYDE APRN
Clinical Nurse Specialist
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 342-3962
DIANA M BUI M.D.
Emergency Medicine
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 301-8000
JENNIFER S PALERMO P.A.
Physician Assistant
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 301-8000
ALICIA CHEN M.D.
Radiology (Diagnostic Radiology)
5777 E MAYO BLVD
PHOENIX, AZ 85054
Maricopa County (480) 301-8000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Mayer's NPI number?

The NPI number for Gregory Mayer is 1881678191. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Where is Gregory Mayer located?

Gregory Mayer practices at 5777 E Mayo Blvd, Phoenix, AZ 85054. The listed phone number is (480) 301-8000.

What is Gregory Mayer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Gregory Mayer was last updated on October 30, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.