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WILLIAM J TSAI MD INC
NPI 1114277738
Internal Medicine in Irvine, CA

Active since September 11, 2012
19742 MACARTHUR BLVD, SUITE 101, IRVINE, CA 92612(949) 955-0202(949) 955-0203 Get Directions Write a Review

NPPES record last updated: September 11, 2012. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William J Tsai Md Inc NPPES

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

WILLIAM J TSAI MD INC (NPI 1114277738) is a healthcare organization registered as an internal medicine in Irvine, California and active in the NPI registry since September 2012. The organization lists William Jen Tsai, Pres/ceo, as its authorized official.

NPPES Registry Identity

NPI1114277738
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameWILLIAM J TSAI MD INC
Location Address19742 MACARTHUR BLVD, SUITE 101Irvine, CA 92612-2432
Mailing Address19742 Macarthur Blvd, Suite 101Irvine, CA 92612-2432 · (949) 955-0202 · Fax (949) 955-0203
Phone(949) 955-0202
Fax(949) 955-0203
Organization SubpartNo
Authorized OfficialWilliam Jen TsaiPres/ceo · (949) 955-0202
Enumeration DateSeptember 11, 2012
✔ NPI 1114277738 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 · A71679
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.
19742 MACARTHUR BLVD, Irvine, CA 92612
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Other Identifiers 3

Medicare UPINH29939CA
Medicaid00A716790CA
Medicare PINA71679CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 15

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

MS. MAUREEN A ROUDINE LMFT
Marriage & Family Therapist
19742 MACARTHUR BLVD, SUITE 125
IRVINE, CA 92612
Orange County (949) 466-4024
DR. VICTORIA BLOOM PH.D.
Psychologist (Clinical)
19742 MACARTHUR BLVD, 115
IRVINE, CA 92612
Orange County (949) 474-8494
DR. ANITA TORUND VERMUND PH.D.
Psychologist (Clinical)
19742 MACARTHUR BLVD, SUITE 125
IRVINE, CA 92612
Orange County (714) 402-6437
MRS. ALFREDA LOUISE VOLBERDING MARITAL FAMILY THERA
Marriage & Family Therapist
19742 MACARTHUR BLVD, STE 145
IRVINE, CA 92612
Orange County (949) 476-8221
MS. GRACIE CHRISTINE LU LCSW
Social Worker (Clinical)
19742 MACARTHUR BLVD, STE. 135
IRVINE, CA 92612
Orange County (949) 505-9982
STEPHANIE WONG PA-C
Physician Assistant
19742 MACARTHUR BLVD
IRVINE, CA 92612
Orange County (949) 428-0330
TRANSFORMING HOPE
Community/Behavioral Health
19742 MACARTHUR BLVD, STE. 135
IRVINE, CA 92612
Orange County (949) 505-9982
MS. RUBINA ALBADER MFT
Marriage & Family Therapist
19742 MACARTHUR BLVD, SUITE 125
IRVINE, CA 92612
Orange County (949) 262-1559

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 J Tsai MD Inc's NPI number?

The NPI number for William J Tsai MD Inc is 1114277738. It was assigned to this organization in the NPPES registry on September 11, 2012.

Where is William J Tsai MD Inc located?

William J Tsai MD Inc is located at 19742 Macarthur Blvd Suite 101, Irvine, CA 92612. The listed phone number is (949) 955-0202.

What is William J Tsai MD Inc'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 J Tsai MD Inc was last updated on September 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.