Esther Chang Weese focuses her practice on health care transactions and regulatory matters. Esther represents large health systems, hospitals, ambulatory surgery centers, cancer treatment facilities and other health care providers on mergers and acquisitions and joint ventures. In addition to her transactional experience, Esther advises clients on health care regulatory issues, including fraud and abuse, self-referral, corporate practice of medicine, the Health Insurance Portability and Accountability Act (HIPAA) and California medical information privacy laws. She has extensive experience drafting contracts, including professional services agreements, medical director agreements, management agreements and affiliation agreements. Esther has also counseled hospital clients on general counsel-type matters, including informed consent, California-mandated reporting laws and California health facility licensing requirements.


  • Represented a national nonprofit health system in its merger with two academic medical centers and long-term affiliation agreement with the associated medical school
  • Represented two ambulatory surgery centers sold to a publicly traded company for approximately $54 million
  • Represented a nationally recognized developer and operator radiation oncology treatment center in its acquisition of a 55 percent controlling interest in a management company for $7.92 million

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  • Chambers USA 2011 to 2014
  • Southern California Super Lawyer, Rising Star (2009 to 2015), Up and Coming 50 Women (2015)
  • The Best Lawyers in America 2014 to 2019 and 2021 to 2022, Health Care Law
  • The National Law Journal, Minority 40 Under 40


  • American Health Lawyers Association


University of Southern California – Gould School of Law, JD, 2002
Boston University School of Public Health, MPH, 1999
Dartmouth College, BA, 1997


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Esther Chang Weese

Publications et événements / Médias

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