BRYN JAMES DUFFY MD
NPI 1235243775
Internal Medicine in San Rafael, CA

Q: What is Bryn Duffy's NPI number?

The NPI number for Bryn Duffy is 1235243775. It was assigned to this individual provider in the NPPES registry on August 19, 2006.

Q: What is Bryn Duffy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Bryn Duffy was last updated on February 1, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 19, 2006

16 BOLANOS DR, SAN RAFAEL, CA 94903(415) 306-1560 Get Directions Write a Review

NPPES record last updated: February 1, 2010. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Bryn James Duffy Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BRYN JAMES DUFFY MD (NPI 1235243775) is an individual internal medicine provider in San Rafael, California, licensed in California (A110571) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1235243775

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameBRYN JAMES DUFFYCredential: MD

Location Address16 BOLANOS DRSan Rafael, CA 94903-3103

Mailing Address80 Ramblewood DrNorth Chili, NY 14514-1033 · (585) 349-9958

Phone(415) 306-1560

Sole ProprietorYes

Enumeration DateAugust 19, 2006

Last NPPES UpdateFebruary 1, 2010

✔ NPI 1235243775 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A110571

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

16 BOLANOS DR, San Rafael, CA 94903

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Bryn Duffy's NPI number?

The NPI number for Bryn Duffy is 1235243775. It was assigned to this individual provider in the NPPES registry on August 19, 2006.

Where is Bryn Duffy located?

Bryn Duffy practices at 16 Bolanos Dr, San Rafael, CA 94903. The listed phone number is (415) 306-1560.

What is Bryn Duffy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Bryn Duffy was last updated on February 1, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.