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

Katherine Joy To'O, MD

Individual provider Body Imaging Physician · NPI 1821128844

Katherine Joy To'O, MD is a Diagnostic Radiology in Palo Alto, California. Qualified in 2005, 21 years ago. Practices with Stanford Health Care, a 3,085-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
21
Licensed in
CA
In the registry since
2007
Specialties on file
2
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
Palo Alto, CA 94304-2203
Phone: (323) 442-7450
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A98082 (CA)
Body Imaging Physician Taxonomy 2085B0100X · Licence A98082 (CA)

Record details

NPI number1821128844
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 7, 2007
Last updated in NPPESDecember 11, 2025
Certification dateDecember 11, 2025

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Stanford Health Care — 3085 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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