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

John Vaughn Siebel, MD

Individual provider Hematology & Oncology Physician · NPI 1780741306

John Vaughn Siebel, MD is a Hematology & Oncology Physician in San Mateo, California. Works from 2 locations. Licensed in California and Idaho.

Licensed in
CA, ID
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

218 De Anza Blvd
San Mateo, CA 94402-3913
Phone: (650) 341-9131
Fax: (650) 341-9135
Show map & directions

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

Additional practice locations (1)

  • 1250 Idaho St, Lewiston, ID 83501-1965 — (208) 743-7427

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence M-13451 (ID)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence G26383 (CA)

Record details

NPI number1780741306
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 2, 2007
Last updated in NPPESNovember 7, 2018
Mailing address2925 Debarr Rd 300, Anchorage, AK 99508-2974

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