Meet Our Leadership

Executive Leadership

Brad Hively

Chief Executive Officer

Matt Miller, M.D., MBA

Chief Operating Officer

Yale D. Podnos, M.D., MPH, FACS

Chief Medical Officer, President of Practice

Philip Reger

Chief Information Officer

Debra Richman

Chief Development Officer

Mihir Shah

Chief Financial Officer

Laura Szitar

Chief People Officer

Daniel Virnich, M.D., MBA

President

Senior Leadership

Hilda Agajanian, MBA

Chief Growth Officer, Founder

Richy Agajanian, M.D.

Chief Clinical Officer, Founder

Donna Arriaga

Senior Director of Operations - North Region

Dan Ayer

Vice President, Operations

John Bayne

Senior Director, Mergers & Acquisitions

Kirsten Bettino

Director, Clinical Trial Operations - TOI Clinical Research

Tracey Black

Clinical Recruitment Manager

Melissa Campenni

Vice President, Strategic Partnerships

Rob Carter

Vice President, Finance

Stacy Constantine

Senior Director of Operations, Florida

Brandi Escarzaga, RN

Director of Nursing

David Goodman

Vice President, Talent Acquisition

Cristina Green

Vice President, Clinical Research

Sarah Hall

Senior Director, Central Operations

Kimberlee Hoertz

Assistant Controller/Director, Accounting

Mark Hueppelsheuser, ESQ

General Counsel

Peter Kim

Director, Strategic Operations

Julie Korinke

Director, Marketing & Communications

Phimchanok (Phim) Kositsawat, CPA

Director, SEC Reporting

Anais Lane, NP

Director, Advanced Practice Providers

Henry Huy Le

Director, Medical Economics

Nolan Mariano

Director, Human Resources

Jeffrey Muralles

Director, Dispensary

Sadaf Rashad, M.D.

Senior Director, Clinical Services

Khurrum Shah, J.D., MBA

Senior Vice President, Compliance

Kelly Silverman

Senior Director, New Market Operations & Implementation

Rakesh Singh, MBA

Director, Technology

Ivy Steele

Director of Operations, South Florida

Ann Louise Tisdale-Ramos

Director, Talent Development

Fred Torres

Vice President, Revenue Cycle Management

Sarah Troutman

Director, Total Rewards

Marisela Urbina

Director, Revenue Cycle Management

Medical Leadership

Yale D. Podnos, M.D., MPH, FACS

Chief Medical Officer, President of Practice

Talat Almukhtar, M.D., MPH

Medical Director

Mitchell Berger, M.D., MMM

Senior UM Medical Director

Christopher Chen, M.D.

Senior Medical Officer for Business Development, Physician Executive Committee

Michael Chung, M.D.

Medical Director of IT, Physician Executive Committee

Brandi Escarzaga, RN

Director of Nursing

Jack Freimann Jr., M.D.

Physician Executive Committee

L. Lisa Ge, M.D.

Medical Director

Daniel Huang, M.D.

Medical Director, Physician Executive Committee

John Khoury, M.D.

Medical Director, Physician Executive Committee

Anais Lane, NP

Director of Advanced Practice Providers

Omkar Marathe, M.D.

Medical Director of Clinical Trials, Physician Executive Committee

Amitabha Mazumder, M.D.

Medical Director, Stem Cell Transplant and Transfusions

John Migliano, M.D.

Medical Director

David Morrison, M.D., Ph.D.

Medical Director of California Dispensary

Roberto Ochoa Planchart, M.D.

Medical Director

Ravin Rupani, M.D.

Medical Director, Physician Executive Committee

Mohammed Hassan Sabbagh, M.D.

Medical Director

Phillip Saunders, D.O.

Medical Director, Physician Executive Committee

Merrill Shum, M.D.

Chair of the Physician Executive Committee, Medical Director of Dispensary & Regional Medical Director

Dong Xiang, M.D.

Medical Director

Chinese (Simplified)