Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Willy Tjong

Individual provider Diagnostic Radiology Physician · NPI 1831544196

Willy Tjong practises Diagnostic Radiology in San Francisco, California. Graduated from State University of Ny Upstate Medical University in 2016, 10 years ago. Practices with Dignity Health Medical Foundation, a 1,204-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
10
Trained at
State University of Ny Upstate Medical University
Licensed in
CA
In the registry since
2016
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

450 Stanyan St
San Francisco, CA 94117-1019
Phone: (415) 750-5770
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A173468 (CA)

Record details

NPI number1831544196
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 24, 2016
Last updated in NPPESFebruary 13, 2024
Certification dateFebruary 12, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolSTATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
Graduated 2016 (10 years in practice)
Group practice Dignity Health Medical Foundation — 1204 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients3,621
Services billed 5,724 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Dominican Hospital Hospital · Santa Cruz, CA · listed as Dominican Hospital Foundation
  • Sequoia Hospital Hospital · Redwood City, CA
  • Ucsf Medical Center Hospital · San Francisco, CA
  • Ucsf Health Saint Francis Hospital Hospital · San Francisco, CA
  • Ucsf Health St. Mary'S Hospital Hospital · San Francisco, CA

Colleagues at Dignity Health Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1204 clinicians in the practice; 12 are shown here.

Other providers in San Francisco