HealthCareAtlasUSA

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Doctors / CA

MATTHEW JAMES O'BRIEN, MD

PSYCHIATRY

Graduated: 2019

NPI: 1376002600

Practice Locations (1)

DEPARTMENT OF STATE HOSPITALS

10333 EL CAMINO REAL, ATASCADERO STATE HOSPITAL

ATASCADERO, CA 934237001

9166518811

Source: CMS National Downloadable File, September 2026.

MATTHEW O'BRIEN, MD | HealthCareAtlasUSA