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

J Brennan Cassidy, MD

Individual provider Adult Medicine Physician · NPI 1528132487

J Brennan Cassidy, MD is an Adult Medicine Physician in Santa Ana, California. Licensed in California. Registered with an NPI since 2006.

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

3929 S Bristol St Ste 202
Santa Ana, CA 92704-7427
Phone: (714) 662-0322
Fax: (714) 662-0329
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Medicine Physician (primary) Taxonomy 207QA0505X · Licence C30247 (CA)

Record details

NPI number1528132487
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 20, 2006
Last updated in NPPESJuly 8, 2007

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