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Thursday, Sep 10, 2026

LA500 2025: John Mazziotta

John Mazziotta


Vice Chancellor,
UCLA Health Sciences
Chief Executive, UCLA Health

Mazziotta is the top official for UCLA Health, overseeing the UCLA David Geffen School of Medicine with its 3,400 faculty members and the UCLA health system with its 35,000-plus employees at four hospitals – the flagship Ronald Reagan UCLA Medical Center, UCLA Santa Monica Medical Center, UCLA Mattel Children’s Hospital and the Stewart and Lynda Resnick Psychiatric Hospital – and more than 250 outpatient facilities. In his role as vice chancellor of UCLA Health Sciences, Mazziotta is overseeing the development of the California Institute for Immunology and Immunotherapy at a UCLA research park planned for the former Westside Pavilion shopping mall in Westwood, which UCLA bought for $700 million.

YEARS ON LA500: 10

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