UC Davis Medical Group Administrative Leadership Team

  • Debbie Aizenberg

    Debbie Aizenberg, M.D.

    Executive Director, UC Davis Medical Group

    Debbie Aizenberg, M.D., is the executive director of UC Davis Medical Group. She provides oversight of physician practice operations and assists in developing the UC Davis Medical Group’s overall vision and strategic direction. She works closely with the UC Davis Medical Group Board and UC Davis Health leadership to enhance clinical operations and ensure the most effective care delivery network through a collaborative approach to planning, marketing, and delivery of coordinated and patient-centric clinical services.

    In addition, Dr. Aizenberg is the associate chief medical officer for Ambulatory Care at UC Davis Health. She is committed to developing patient-centered care systems and enhancing clinical efficiencies, focusing on health system growth, significant strategic partnerships, and innovative solutions to meet patient and health system needs.

    Dr. Aizenberg has received institutional awards for excellence in service and compassion and has been recognized as a top doctor in regional and national media. As a professor in the Department of Otolaryngology, she provides direct patient care in the field of pediatric otolaryngology and participates in research and scholarship in the fields of practice management and gender diversity.

    Dr. Aizenberg completed the McGill University Med-P program, accelerating her completion of medical school at McGill University in Montreal, Canada. She then completed her general surgery internship and otolaryngology head and neck surgery residency training at UC Davis Health. She has subspecialty certification in complex pediatric otolaryngology and is a graduate of the Drexel University Hedwig van Ameringen Executive Leadership in Healthcare Program. 

  • Jake Johnson, M.P.H., P.M.P., P.C.M.H. C.C.E.

    Jake Johnson, M.P.H., P.M.P., P.C.M.H. C.C.E.

    Director of Operations, UC Davis Medical Group

    Johnson oversees the work of the Board of the UC Davis Medical Group, provides financial management, interfaces with external organizations, and supervises staff hiring, evaluation, and professional development. Prior to his work at UC Davis, Johnson served for nine years at Santa Clara County Health and Hospital System, leading strategic transformation efforts. He began at Santa Clara County in Finance Administration, and he directed Ambulatory Care efforts and teams that spanned the Primary care Paneling Department, The Referrals and Authorizations Center, Specialty Operations, and Primary Care Operations Improvement.

    Johnson holds a Master’s in Healthcare Management and Policy from the University of Michigan in Ann Arbor, MI, and he holds two bachelor’s degrees in English and Business Administration from Augustana College- Rock Island, IL. Jake is a certified Project Management Professional (PMP), and he holds certification by the Institute for Healthcare Improvement (IHI) in Root Cause Analysis. He is a member of the American College of Healthcare Executives (ACHE) and the Medical Group Management Association (MGMA). Jake is also an NCQA Certified Content Expert (CCE) in Patient Centered Medical Home Implementation.

  • Administrative Staff

    Matthew Startup

    Project Manager

    Jacqueline Ames

    Decision Support Specialist

    Sophie Javines

    Decision Support Specialist

    Harry Randhawa

    Decision Support Specialist

    Rozana Abuhamdi

    Admin Officer II

    Suzanne Ziemer

    Admin Officer II