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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

IRENE WALKER MARQUEZ-BIGGS M.D.
NPI 1801842869
Hospitalist in Phoenix, AZ

Active since May 25, 2006
350 W THOMAS RD, PHOENIX, AZ 85013(602) 406-3000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Irene Walker Marquez-biggs M.d. NPPES

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

IRENE WALKER MARQUEZ-BIGGS M.D. (NPI 1801842869) is an individual hospitalist provider in Phoenix, Arizona, licensed in Arizona (32570) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1801842869
Entity TypeIndividualFemale
Primary Taxonomy208M00000X
Provider Legal NameIRENE WALKER MARQUEZ-BIGGSCredential: M.D.
Location Address350 W THOMAS RDPhoenix, AZ 85013-4409
Mailing AddressPo Box 27340Phoenix, AZ 85061-7340 · (602) 943-9200 · Fax (602) 216-3000
Phone(602) 406-3000
Sole ProprietorNo
Enumeration DateMay 25, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1801842869 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in AZ · 32570
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedPediatricsTaxonomy 208000000X · License 32570 (AZ)
350 W THOMAS RD, Phoenix, AZ 85013
Open in Google Maps ↗

Other Identifiers 1

Medicaid846694AZ

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.

DR. JASPREET SIAN M.D.
Student in an Organized Health Care Education/Training Program
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-3540
BRANDON ROBERT MAY
Psychiatry & Neurology (Vascular Neurology)
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-6262
DR. JACOB WESLEY SANDERS
Student in an Organized Health Care Education/Training Program
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-6262
SANFORD ORNSTEIN M.D.
Radiology (Diagnostic Radiology)
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-3430
LINDLEY T BLISS MD
Hospitalist
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 615-5672
DR. TILINA N. HU MD
Radiology (Diagnostic Radiology)
350 W THOMAS RD, RADIOLOGY DEPARTMENT
PHOENIX, AZ 85013
Maricopa County (602) 406-3430
JASON AARON BESTE M.D.
Hospitalist
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-5590
JOEL JAMES HAYDEN MD
Radiology (Diagnostic Radiology)
350 W THOMAS RD
PHOENIX, AZ 85013
Maricopa County (602) 406-3430

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 Irene Marquez-biggs's NPI number?

The NPI number for Irene Marquez-biggs is 1801842869. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Where is Irene Marquez-biggs located?

Irene Marquez-biggs practices at 350 W Thomas Rd, Phoenix, AZ 85013. The listed phone number is (602) 406-3000.

What is Irene Marquez-biggs's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

When was this NPI record last updated?

The NPPES record for Irene Marquez-biggs was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.