Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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John Gifford Boyce-Smith, MD

Individual provider Internal Medicine Physician · NPI 1255925590

John Gifford Boyce-Smith, MD is an Internal Medicine Physician in Sonoma, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2021
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

4863 Grove St
Sonoma, CA 95476-6052
Phone: (415) 613-5338
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C23592 (CA)

Record details

NPI number1255925590
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 26, 2021
Last updated in NPPESFebruary 26, 2021
Certification dateFebruary 26, 2021

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