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

STEPHANIE ELIZABETH O'BRIEN DO
NPI 1346944105
Hospitalist in Tucson, AZ

Active since March 27, 2023
6200 N LA CHOLLA BLVD, TUCSON, AZ 85741(520) 742-9000 Get Directions Write a Review

NPPES record last updated: July 9, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 9, 2026, Mar 27, 2023 (2 updates tracked since 2023).

About Stephanie Elizabeth O'brien Do NPPES

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

STEPHANIE ELIZABETH O'BRIEN DO (NPI 1346944105) is an individual hospitalist provider in Tucson, Arizona, licensed in Arizona (012484) and active in the NPI registry since March 2023.

NPPES Registry Identity

NPI1346944105
Entity TypeIndividualFemale
Primary Taxonomy208M00000X
Provider Legal NameSTEPHANIE ELIZABETH O'BRIENCredential: DO
Location Address6200 N LA CHOLLA BLVDTucson, AZ 85741-3529
Mailing Address6200 N La Cholla BlvdTucson, AZ 85741-3529 · (520) 742-9000
Phone(520) 742-9000
Sole ProprietorNo
Enumeration DateMarch 27, 2023
Last NPPES UpdateJuly 9, 20262 updates tracked since enumeration
NPPES CertifiedJuly 9, 2026
✔ NPI 1346944105 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 · 012484
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 ListedInternal MedicineTaxonomy 207R00000X · License 012484 (AZ)
6200 N LA CHOLLA BLVD, Tucson, AZ 85741
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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.

ELLEN MARIE KULESA CRNA
Nurse Anesthetist, Certified Registered
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
ALEXIS JIMENEZ DO
Student in an Organized Health Care Education/Training Program
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
EMMANUEL ASLAN GALLEGOS
Student in an Organized Health Care Education/Training Program
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
DR. DAVID M SCHWARTZ DO
Internal Medicine
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 469-8011
PAMELA D LOWE APRN, ACNPC-AG
Nurse Practitioner (Acute Care)
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
ERIC STANLEY CRNA
Nurse Anesthetist, Certified Registered
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
CAMERON TAYLOR FRICKE BSN RN
Registered Nurse (Critical Care Medicine)
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000
JULIE TAMAYO DO
Student in an Organized Health Care Education/Training Program
6200 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-9000

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 Stephanie O'brien's NPI number?

The NPI number for Stephanie O'brien is 1346944105. It was assigned to this individual provider in the NPPES registry on March 27, 2023.

Where is Stephanie O'brien located?

Stephanie O'brien practices at 6200 N La Cholla Blvd, Tucson, AZ 85741. The listed phone number is (520) 742-9000.

What is Stephanie O'brien'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 Stephanie O'brien was last updated on July 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 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.