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WILLIAM C. TSANG MD
NPI 1891871315
Internal Medicine in San Jose, CA

Active since October 27, 2006
260 INTERNATIONAL CIR, SAN JOSE, CA 95119(408) 972-7000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William C. Tsang Md NPPES

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

WILLIAM C. TSANG MD (NPI 1891871315) is an individual internal medicine provider in San Jose, California, licensed in California (A39739) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1891871315
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM C. TSANGCredential: MD
Location Address260 INTERNATIONAL CIRSan Jose, CA 95119-1130
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3429 · (510) 625-6262
Phone(408) 972-7000
Sole ProprietorNo
Enumeration DateOctober 27, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1891871315 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A39739
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
260 INTERNATIONAL CIR, San Jose, CA 95119
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Other Identifiers 3

Medicare ID-Type Unspecified00A397390
Medicaid00A397390CA
Medicare UPINA28958

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.

VAJIRAMALA R. DHARMASENA MD
Obstetrics & Gynecology
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
SABIHA R. VYAS MD
Internal Medicine
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
BIEN D. NGUYEN MD
Internal Medicine
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
STEPHANIE K. ROWEN MD
Plastic Surgery
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
CLIFFORD HARRIS MD
Urology
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
MATEO GO MD
Internal Medicine (Interventional Cardiology)
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
THOMAS T.H. LIN MD
Obstetrics & Gynecology
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000
VENNY V. LEE MD
Pediatrics
260 INTERNATIONAL CIR
SAN JOSE, CA 95119
Santa Clara County (408) 972-7000

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 William Tsang's NPI number?

The NPI number for William Tsang is 1891871315. It was assigned to this individual provider in the NPPES registry on October 27, 2006.

Where is William Tsang located?

William Tsang practices at 260 International Cir, San Jose, CA 95119. The listed phone number is (408) 972-7000.

What is William Tsang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for William Tsang 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.