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Leadership Team

Headshot of Acuity Eye Group co-founder Tom Chang MD smiling on a grey background

Tom Chang, MD

Founder & Managing Partner

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Headshot of Acuity Eye Group co-founder Michael Samuel smiling on a grey background

Michael Samuel, MD

Founder & Chief Medical Director

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Education & Innovation

Michael Davis, retina specialist at Acuity Eye Group

Michael Davis, MD

Fellowship Educational Director

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Sharon Dyer, Optometrist at West Coast Eye Care and Acuity Eye Group

Sharon Dyer, OD

Director of Optometry Practice

Headshot of Pia Rios

Pia Rios

Executive Director

Clinical Operations

Sal Tariq

VP of Business Analytics

Angie Berber Director of Call Center

Angie Berber

Director of Contact Center


Marlana Rivera

Director of Field Operations - Los Angeles, Orange County, and Inland Empire


Jessica King

Director of Field Operations - San Diego East

Adriana Cruz_aeg.jpg

Adriana Cruz

Director of Field Operations - San Diego West


Eddie Arreola

Director of Field Operations - Inland Empire

Clinical Engineering, Research & Development

Photo of Jonathan Cohen

Jonathan Cohen

VP of Information System

Photo of Joe Viscomi

Joseph Viscomi

Chief Technology Officer

Headshot of Brett Harris

Brett Harris

IT Services Manager

Mher Grigoryan of Acuity Eye Group

Mher Grigoryan

Manager of Special Projects

Stephen Jewell of Acuity Eye Group

Stephen Jewell

Systems Administrator

Nathan Lowry at Acuity Eye Group

Nathan Lowry

Principal Data Scientist


Samantha Hofstad of Acuity Eye Group

Samantha Hofstad Chi

VP of Finance & Accounting


Kimberly Dillard

Director of Revenue Cycle

Enriqueta Cortes of Acuity Eye Group

Enriqueta Cortes

Revenue Cycle Manager


Terry Marchillo of Acuity Eye Group

Terry Marchillo

Director of Contracts & New Business Development

Marie Sakounphong of Acuity Eye Group

Marie Sakounphong

Compliance Manager

Human Resources

Celia Leung Director of HR

Celia Leung

Director of Human Resources

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Sheri Alley Credentialing Department of Acuity Eye Group

Sheri Alley

Director of Credentialing

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Arcy Bumgarner Payroll Manager

Arcelia Bumgarner

Payroll Manager

Ambulatory Surgery Centers

Nicole Murphy_aeg.jpg

Nicole Murphy

Director of Ambulatory Surgery Centers

Susi Khan Director of Nursing

Susi Khan

Director of Nursing

Nancy Montigny

Nancy Montigny

Director of Nursing

Kimberly Quaglia Director of Nursing

Kimberly Quaglia

Director of Nursing

Our clinical leadership team is made up of 18 physicians who mentor our doctors and drive the clinical culture in our practices.