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

Hannah O'Brien, PA-C

Individual provider Physician Assistant · NPI 1780216598

Hannah O'Brien, PA-C is a Physician Assistant in Redwood City, California. Graduated from University of Southern California Keck School of Medicine in 2020, 6 years ago. Practices with Alameda Health System, a 601-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2020
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

18 Spinnaker Pl
Redwood City, CA 94065-1294
Phone: (925) 382-4824
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA58222 (CA)

Record details

NPI number1780216598
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedFebruary 10, 2020
Last updated in NPPESMay 20, 2026
Certification dateMay 20, 2026

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Group practice Alameda Health System — 601 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Redwood City