THOMAS M. CALLAN OD
NPI 1043348394
Optometrist in Walnut Creek, CA

Q: What is Thomas Callan's NPI number?

The NPI number for Thomas Callan is 1043348394. It was assigned to this individual provider in the NPPES registry on March 1, 2007.

Q: What is Thomas Callan's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Callan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.

Active since March 01, 2007

675 YGNACIO VALLEY RD, SUITE B103, WALNUT CREEK, CA 94596(925) 933-0270(925) 933-4721 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Thomas M. Callan Od NPPES

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

THOMAS M. CALLAN OD (NPI 1043348394) is an individual optometrist in Walnut Creek, California, licensed in California (OPT 7749 TPG) and active in the NPI registry since March 2007.

NPPES Registry Identity

NPI1043348394

Entity TypeIndividualMale

Primary Taxonomy152W00000X

Provider Legal NameTHOMAS M. CALLANCredential: OD

Location Address675 YGNACIO VALLEY RD, SUITE B103Walnut Creek, CA 94596-3860

Mailing Address675 Ygnacio Valley Rd, Suite B103Walnut Creek, CA 94596-3860 · (925) 933-0270 · Fax (925) 933-4721

Phone(925) 933-0270

Fax(925) 933-4721

Sole ProprietorYes

Enumeration DateMarch 1, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1043348394 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in CA · OPT 7749 TPG

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

675 YGNACIO VALLEY RD, Walnut Creek, CA 94596

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Other Identifiers 2

Medicare ID-Type UnspecifiedSD0077490CA

Medicare UPINT90116CA

Other Providers at the Same Location NPPES 14

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

JONATHAN GELERIS D.D.S.

Dentist (General Practice)

675 YGNACIO VALLEY RD, B105
WALNUT CREEK, CA 94596

Contra Costa County (925) 813-0402

AVCARE - SENIORS IN-HOME HELPMATES

In Home Supportive Care

675 YGNACIO VALLEY RD, STE B-108
WALNUT CREEK, CA 94596

Contra Costa County (800) 557-4905

MING FANG MD INC

Internal Medicine (Gastroenterology)

675 YGNACIO VALLEY RD, SUITE 215
WALNUT CREEK, CA 94596

Contra Costa County (925) 776-7600

MARIDEZ BRINAS JENKINS F.N.P.

Nurse Practitioner (Family)

675 YGNACIO VALLEY RD
WALNUT CREEK, CA 94596

Contra Costa County (650) 692-9751

DR. NICHOLAS HUGHES HYDE MD

Phlebology

675 YGNACIO VALLEY RD, SUITE B214
WALNUT CREEK, CA 94596

Contra Costa County (925) 937-8346

INSIGHT VISION CARE OPTOMETRY

Optometrist

675 YGNACIO VALLEY RD, #B103
WALNUT CREEK, CA 94596

Contra Costa County (925) 933-4700

MING FANG MD

Internal Medicine (Gastroenterology)

675 YGNACIO VALLEY RD, SUITE 215
WALNUT CREEK, CA 94596

Contra Costa County (925) 776-7600

MICHAEL A. ROY, O.D. INC.

Clinic/Center (Health Service)

675 YGNACIO VALLEY RD, SUITE B103
WALNUT CREEK, CA 94596

Contra Costa County (925) 933-4700

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 Thomas Callan's NPI number?

The NPI number for Thomas Callan is 1043348394. It was assigned to this individual provider in the NPPES registry on March 1, 2007.

Where is Thomas Callan located?

Thomas Callan practices at 675 Ygnacio Valley Rd Suite B103, Walnut Creek, CA 94596. The listed phone number is (925) 933-0270.

What is Thomas Callan's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for Thomas Callan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.