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

Dr. Patrick Shawn Twomey, MD

Individual provider Internal Medicine Physician · NPI 1265639454

Dr. Patrick Shawn Twomey, MD is an Internal Medicine Physician in South San Francisco, California. Licensed in Virginia. Registered with an NPI since 2007.

Licensed in
VA
In the registry since
2007
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

1 Dna Way
South San Francisco, CA 94080-4918
Phone: (650) 225-2580
Fax: (650) 225-6000
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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 0101245204 (VA)

Record details

NPI number1265639454
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 29, 2007
Last updated in NPPESFebruary 15, 2018

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