Contact Us

For all patient inquiries, please contact your practice location. For all HR, accounting and admin inquiries, please contact us using the link below:

UHA Headquarters
7999 Gateway Blvd., Suite 200 Newark, CA 94560


About University HealthCare Alliance

University HealthCare Alliance (UHA) is a medical foundation born out of the aspiration for Stanford Medicine and local, high-quality providers to partner together to bring a greater range of leading-edge health care services to patients within surrounding communities.

UHA was formed January 1, 2011 as a 1206 (L) Medical Foundation organized to operate and own medical practices. UHA is comprised of three medical groups with over 70 clinic locations and over 350 board-certified primary care and specialty care providers located across Bay Area communities. UHA also includes an affiliated IPA network – Affinity Medical Group – which provides additional high-quality, innovative, and affordable health care solutions, to give our patients the choices, flexibility and high standards of quality care they deserve.

UHA is truly contributing to Stanford University’s well-respected hospital and clinic’s transformation into a high-performing health system. Together, UHA and Stanford are pioneering new ways to practice medicine across multiple locations, using Stanford’s advanced resources to create seamless continuity of care for every patient.




UHA Leadership

Catherine Krna, MBA
President and Chief Executive Officer

Bryan Bohman, MD
Chief Medical Officer and Associate Dean, University HealthCare Alliance
Associate Chief Medical Officer, Stanford Health Care
Clinical Professor, Anesthesiology and Critical Care, Stanford School of Medicine

Michael O’Connell, MHA, FACMPE, FACHE
Senior Vice President, Operations

Rochelle Noone, MS
Vice President of Human Resources, Inclusion and Diversity

Mike Weatherford
Senior Vice President, Finance

Stephan Schwarzwaelder, RN, MS, PMP
Vice President, Quality

Tim Polley, MBA
Vice President, Strategy and Market Optimization

David Overton, RN, MHA, CCM, FACHE
Interim Vice President, Accountable Care Operations

Richard Sankary, MD
President, Affinity Medical Group IPA
President, University Medical Partners (UMP)

Michael Kim, MD
Associate Chief Medical Officer
Medical Informatics Director, Network of Care, Stanford Health Care
UHA Operations Medical Director

Angela Montesa Deftos, RN, MBA, DBA 
Vice President, Medical Group Strategy and People
Medical Group Strategy and Network Division



UHA has a Board of Directors and committees with representation and active participation of leaders from the School of Medicine and Stanford Health Care. Members establish the growth objectives they seek to implement through UHA and provide written consent before UHA enters into a Physicians Service Agreement with a Medical Group.


Leonard Almalech Bryan Bohman, MD
Marcia Cohen Robert Harrington, MD
Linda Hoff Chuck Koob
Catherine Krna Megan Mahoney, MD
Quinn McKenna Anthony Powell, MD
Margaret Raffin Norman Rizk, MD
Rachel Roberts, MD Richard Sankary, MD