MR. WILLIAM VAY TSU P.A
NPI 1912256439
Physician Assistant in San Francisco, CA

Active since August 29, 2012PECOS EnrolledAccepts Medicare Assignment
326 32ND AVE APT 4, SAN FRANCISCO, CA 94121(714) 614-1541 Get Directions Write a Review

NPPES record last updated: December 9, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 9, 2022, Mar 31, 2017 (2 updates tracked since 2017).

About Mr. William Vay Tsu P.a NPPES

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

MR. WILLIAM VAY TSU P.A (NPI 1912256439) is an individual physician assistant in San Francisco, California and active in the NPI registry since August 2012. He is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1912256439
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. WILLIAM VAY TSUCredential: P.A
Location Address326 32ND AVE APT 4San Francisco, CA 94121-1740
Mailing Address326 32nd Ave Apt 4San Francisco, CA 94121-1740 · (714) 614-1541
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateAugust 29, 2012
Last NPPES UpdateDecember 9, 20222 updates tracked since enumeration
NPPES CertifiedDecember 9, 2022
✔ NPI 1912256439 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
326 32ND AVE APT 4, San Francisco, CA 94121

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. William Vay Tsu P.a is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890912091
PECOS Enrollment IDI20140812001993
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94121 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Tsu's NPI number?

The NPI number for William Tsu is 1912256439. It was assigned to this individual provider in the NPPES registry on August 29, 2012.

Where is William Tsu located?

William Tsu practices at 326 32nd Ave Apt 4, San Francisco, CA 94121. The listed phone number is (714) 614-1541.

What is William Tsu's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is William Tsu enrolled in Medicare?

Yes. William Tsu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for William Tsu was last updated on December 9, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.