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

Jack William O'Sullivan, MD

Individual provider Cardiovascular Disease Physician · NPI 1952930570

Jack William O'Sullivan, MD is a Cardiovascular Disease (Cardiology) in Stanford, California. Qualified in 2018, 8 years ago. Works from 2 locations. Licensed in California.

Years since qualifying
8
Licensed in
CA
In the registry since
2020
Specialties on file
2
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

300 Pasteur Dr
Stanford, CA 94305-2200
Phone: (650) 723-4000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3801 Miranda Ave Uppr Va, Palo Alto, CA 94304-1207 — (650) 493-5000

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence A180700 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A180700 (CA)

Record details

NPI number1952930570
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 6, 2020
Last updated in NPPESJuly 23, 2026
Certification dateJuly 23, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Accepts Medicare assignment Not indicated

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