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

Bryn James Duffy, MD

Individual provider Internal Medicine Physician · NPI 1235243775

Bryn James Duffy, MD is an Internal Medicine Physician in San Rafael, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
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

16 Bolanos Dr
San Rafael, CA 94903-3103
Phone: (415) 306-1560
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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 A110571 (CA)

Record details

NPI number1235243775
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 19, 2006
Last updated in NPPESFebruary 1, 2010
Mailing address80 Ramblewood Dr, North Chili, NY 14514-1033

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