Quick answers
- Where does Jack W. Osullivan see patients?
- Medicare's clinician data lists 1 practice location in Palo Alto, CA. Call before your visit to confirm the address.
- What is Jack W. Osullivan's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Jack W. Osullivan accept Medicare assignment?
- Medicare's clinician data says Jack W. Osullivan may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Jack W. Osullivan's NPI number?
- 1952930570. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Jack W. Osullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 500 Pasteur Dr, Fl 3Palo Alto, CA 94304
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Palo Alto
Clinicians with the same Medicare primary specialty in Palo Alto, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1952930570 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians