HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

ZACHARY GERARD O'LEARY, PA

PHYSICIAN ASSISTANT

Medical school: STANFORD UNIVERSITY SCHOOL OF MEDICINE

Graduated: 2021

Offers telehealth

NPI: 1083298178

Practice Locations (3)

UNIVERSITY HEALTHCARE ALLIANCE

20642 JOHN DR

CASTRO VALLEY, CA 945465103

8889241036

UNIVERSITY HEALTHCARE ALLIANCE

27206 CALAROGA AVE, SUITE 105

HAYWARD, CA 945454300

8889241036

UNIVERSITY HEALTHCARE ALLIANCE

4725 1ST ST, SUITE 100

PLEASANTON, CA 945667366

9254627060

Source: CMS National Downloadable File, September 2026.

ZACHARY O'LEARY, PA | HealthCareAtlasUSA