• Clinical Leadership

    With significant experience and expertise, our physician leaders collaborate with other nephrologists to transform kidney care.

    • Clinical Leadership

    With significant experience and expertise, our physician leaders collaborate with other nephrologists to transform kidney care.

Clinical Leadership Team

DaVita-affiliated physicians have access to DaVita’s Office of the Chief Medical Officer (OCMO) physician leaders to collaborate and receive input whenever needed. Dedicated to improving kidney care and the lives of patients, OCMO leaders oversee initiatives such as:

  • Developing a transformative vision of improved health care
  • Collaborating with the nephrologist community
  • Taking accountability for improving results
  • Addressing challenging clinical topics
  • Investing in physician development across all levels
  • Striving for a high level of physician satisfaction
Clinical Leadership Team

Office of the Chief Medical Officer

Jeffrey Giullian, MD, MBA

Chief Medical Officer, DaVita Kidney Care

George R. Aronoff, MD

Vice President, Clinical Affairs

Brendan Bowman, MD

Vice President, Medical Affairs

Steven M. Brunelli, MD, MSCE

Vice President and Medical Director, Health Analytics and Insights, DaVita Clinical Research

Partha Das, MBBS, MSc

Chief Medical Officer, DaVita International

James Iqbal, MD, PhD

Vice President, Lab Director

Mark R. Kaplan, MD

Vice President, DaVita Medical Affairs

Sireesha Koppula, MD, MPH, MBA

Chief Medical Officer, DaVita NPS

Mahesh Krishnan, MD, MPH, MBA

Group Vice President, Research and Development

David L. Mahoney, MD

Chief Medical Officer, DaVita Hospital Services Group and Skilled Nursing Facility Dialysis

Dana Mitchell, MD

Group Medical Director, Galaxy

Michael Moustakakis, MD

Vice President, Clinical Education, Group Medical Director

Mihran Naljayan, MD

Chief Medical Officer, Home Modalities and Pediatrics

Unini Odama, MD, MPH

Vice President, Medical Affairs

Michael O’Shea, MD

Vice President, Clinical Leadership for DaVita IKC

William Paxton, MD, PhD

Group Medical Director, Trailblazers and Endeavor

David A. Roer, MD

Chief Medical Officer, DaVita IKC

Bernie del Rosario, MD

Vice President, Home Modalities

Sonia Samagh, MD, MBA

Division Vice President of Operations, IKC West

Martin Schreiber, MD

Vice President, Home and Pediatric Dialysis

Amy Schuerman-Gen, MD

Vice President, Clinical Operations for DaVita IKC

Ehsan Shahmir, MD

Group Medical Director, Polaris

Mark Shapiro, MD

Vice President, Medical Affairs

Francesca Tentori, MD, MSCI

Vice President, DaVita Outcomes Research and Patient Empowerment

Adam Weinstein, MD

Chief Medical Information Officer