William J. Tsai, M.D.Inc
About This Business
William J. Tsai, MD, is an internal medicine physician in Irvine, California, with 29 years of practice since 1997. He is one of 15 internal medicine physicians among the 103 Irvine doctors in our directory. He is affiliated with Hoag Memorial Hospital Presbyterian and UCI Health-Orange. In MIPS, the federal program scoring Medicare clinicians on quality and cost, he holds 16.1 out of 100. He accepts Medicare and offers telehealth, one of 29 Irvine doctors in our directory offering both. Patients rate him 4.4 across 26 reviews.
Verified Provider Info
- Specialty (per registry)
- Internal Medicine
- NPI Number
- 1952356560
- Medical school graduate
- 1997 (29+ years of practice)
- State license
- A71679 (CA)
- Hospital affiliations
- Hoag Memorial Hospital Presbyterian · Uci Health-Orange
- Quality score (CMS MIPS)
- 16.1/100
Source: NPPES NPI Registry (CMS) · CMS Doctors & Clinicians dataset · checked 2026-08-19
Location on Map
Map data © Google. Loading this map may set cookies from Google. See our Cookie Policy and Privacy Policy.
Information last updated: August 23, 2026
More Doctor Businesses
View allNearby doctor businesses
Closest listings to this location, by real distance.