Kathleen (Katie) M. O'Neill is an associate in the Corporate Practice Group and member of the Healthcare Team located in the firm's Chicago office. Katie has been recognized by Best Lawyers as One to Watch for Health Care Law.

Areas of Practice

Katie O’Neill guides healthcare clients through strategic transactions and legal issues impacting daily operations. As a former registered nurse, Katie is resourceful and practical in helping clients resolve legal issues and reduce risk. She advises a broad range of industry participants, including physician groups, private equity investors, management services organizations, non-profit health systems, and payors.

Her transactional practice centers on mergers and acquisitions, joint ventures and other strategic affiliations. Katie’s advisory practice spans corporate governance, commercial contracting, and a variety of other healthcare issues. She regularly negotiates services arrangements (administrative, management, ancillary and professional services, purchasing and supply chain) and employment contracts (physicians, dentists, advanced practice nurses, physician assistants, other provider types).

Katie keeps up to date on federal and state laws governing healthcare operations, including corporate practice of medicine, reimbursement, fraud and abuse, licensing, and peer review, including related reporting. Her practice is further supported by frequent collaboration with colleagues in employee benefits, financing, labor and employment, non-profits, real estate, and tax.



"Ones to Watch," Best Lawyers, 2024

Recommended Lawyer: Healthcare, Legal 500, 2023



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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