Kathleen (Katie) M. O'Neill is a senior associate in the Corporate Practice Group and a member of the Healthcare Team and our Women in Healthcare Leadership Collaborative. Katie has a diverse healthcare practice and been recognized by Best Lawyers as One to Watch for Health Care Law.

Areas of Practice

Katie O’Neill represents medical groups, independent practice associations, management services organizations, hospital systems,  payors and other healthcare industry clients, both for-profit and non-profit. On the transactional side, she manages mergers and acquisitions, joint ventures and strategic affiliations. Katie also advises on legal issues impacting operations, including commercial contracting, corporate governance, provider employment, licensing, telemedicine, regulatory transaction reviews and approvals, corporate practice of medicine, reimbursement, fraud and abuse, licensing, peer review and mandated reporting.

In her prior career, Katie worked for several years as a registered nurse at a major academic medical center in Chicago. Her hands-on experience in healthcare delivery and clinical operations informs her advice to clients on value-based care transformation initiatives, including risk-based contracting, population health management, team-based care, care coordination, risk adjustment, provider alignment strategies, ACOs, and clinically integrated networks. She keeps current on new laws and healthcare industry trends in order to provide comprehensive, forward looking guidance that clients can use to navigate changing market conditions.



"Ones to Watch," Best Lawyers, 2024

Recommended Lawyer: Healthcare, Legal 500, 2023

  • Legal500 US Recommended Attorney



Corporate & Securities Law Blog Posts

Healthcare Law Blog Posts

Speaking Engagements

  • "Implementation of Final Health Care Decisions: Practical Advice for Attorneys," San Diego County Bar Association, November 6, 2019



J.D., Northwestern University School of Law, 2015, magna cum laude, Order of the Coif

B.S., Nursing, Loyola University of Chicago, 2009, magna cum laude


  • Legal Extern at Lurie Children’s
  • Legal Extern to the Honorable Sidney I. Schenkier, U.S. District Court for the Northern District of Illinois


  • Illinois
  • California
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