Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Ryan Tay Chao, MD

Individual provider Radiation Oncology Physician · NPI 1235471608

Ryan Tay Chao, MD is a Diagnostic Radiology in Stanford, California. Qualified in 2013, 13 years ago. Practices with Stanford Health Care, a 3,085-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
13
Licensed in
CA
In the registry since
2013
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

300 Pasteur Dr
Stanford, CA 94305-2200
Phone: (650) 723-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 5555 W Las Positas Blvd, Pleasanton, CA 94588-4000 — (925) 734-3376
  • 751 S Bascom Ave, San Jose, CA 95128-2604 — (408) 885-5110

Specialties & licences

Vascular & Interventional Radiology Physician (primary) Taxonomy 2085R0204X · Licence A131676 (CA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence A131676 (CA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence A131676 (CA)

Record details

NPI number1235471608
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 22, 2013
Last updated in NPPESApril 5, 2024
Certification dateApril 5, 2024
Mailing address5555 W Las Positas Blvd, Pleasanton, CA 94588-4000

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Stanford Health Care — 3085 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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