Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GEORGE M O'BRIEN D.O.
NPI 1235299579
Family Medicine in Mesa, AZ

Q: What is George O'brien's NPI number?

The NPI number for George O'brien is 1235299579. It was assigned to this individual provider in the NPPES registry on December 9, 2006.

Q: What is George O'brien's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for George O'brien was last updated on July 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 42 days 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.

Active since December 09, 2006

7445 E EAGLE CREST DR UNIT 1028, MESA, AZ 85207(480) 981-7400(480) 396-6231 Get Directions Write a Review

NPPES record last updated: July 12, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. George M O'brien D.o. NPPES

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

DR. GEORGE M O'BRIEN D.O. (NPI 1235299579) is an individual family medicine provider in Mesa, Arizona, licensed in Arizona (AZ2918) and active in the NPI registry since December 2006.

NPPES Registry Identity

NPI1235299579

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. GEORGE M O'BRIENCredential: D.O.

Location Address7445 E EAGLE CREST DR UNIT 1028Mesa, AZ 85207-1027

Mailing Address7445 E Eagle Crest Dr, #1028Mesa, AZ 85207-1026 · (480) 981-7400

Phone(480) 981-7400

Fax(480) 396-6231

Sole ProprietorYes

Enumeration DateDecember 9, 2006

Last NPPES UpdateJuly 12, 2026

✔ NPI 1235299579 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in AZ · AZ2918

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

7445 E EAGLE CREST DR UNIT 1028, Mesa, AZ 85207

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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 George O'brien's NPI number?

The NPI number for George O'brien is 1235299579. It was assigned to this individual provider in the NPPES registry on December 9, 2006.

Where is George O'brien located?

George O'brien practices at 7445 E Eagle Crest Dr Unit 1028, Mesa, AZ 85207. The listed phone number is (480) 981-7400.

What is George O'brien's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for George O'brien was last updated on July 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 42 days 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.