John P. Marren
In Memoriam
It is with great sadness and a profound sense of loss that we share the news of the sudden death of John P. Marren, one of our firm’s founding partners. He died peacefully on January 24, 2025.
A brilliant, respected attorney, John led the firm’s health care department from its inception in 1993. The health care industry recognized John as a national expert in managed care, antitrust, clinical integration, value-based care, population health, and other hospital/physician alignment strategies. For our part, however, we will fondly remember John for his larger-than-life personality, quick wit, generous and loyal friendship, and his utter devotion to his family.
John was the beloved husband of Mary, father of Mary Eileen, Brian (McKayle) and James “J.J.” (Lauren), and the doting grandfather of Max and Harper.
Education
- Loyola University School of Law (J.D., 1983)
- St. Xavier University (B.A., Psychology & Biology, 1970)
Admissions
- Illinois (1983)
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U.S. District Court, Northern District of Illinois
- American Health Lawyers Association (Member)
- Chicago Bar (Member)
- Illinois State Bar (Member)
- American Bar Association (Member)
- “Managed Care Law Manual, Health Law Center” (Consulting Editor)
- Loyola University of Chicago College of Law (Associate Professor)
- J.L. Kellogg Graduate School of Management, Northwestern University (Adjunct Faculty Member)
Publications/Events
- “Clinical Integration Networks and Accountable Care Organizations: Topics for Developing High Value CINs and ACOs,” American Health Lawyers Association Physician and Hospital Law Institute (2018).
- “The Legal Framework for Clinical Integration,” Texas Hospital Association, Clinical Integration Task Force (2009).
- “Clinical Integration: Lessons Learned (the Good, the Bad, and the Ugly),” American Health Lawyers Association (2008).
- “Law of Medical Practice in Illinois, 3rd Edition, Chapter 13, “’Managed Care,’” Thompson-West (2007).
- “Clinical Integration as a Physician-Hospital Alignment Strategy,” American Federation of Hospitals, Fall Policy Conference (Sept. 2007).
- “Clinical Integration: Practical Insights and Current Developments,” The Institute for Clinical Quality & Value (June 2007).
- “The FTC’s Advocate Health Decision and Its Impact on PHO’s, Clinical Integration, and Price Fixing,” The American Bar Association, Health Law Section (June 2007).
- “Clinical Integration: A Physician and Hospital Strategy for Better Quality, Enhanced Competition, and Collective Contracting, Hospitals and Health Systems Law Institute,” American Health Lawyers Association (Feb. 2007).
- “Clinical Integration: Managed Care Contracting as a Catalyst for Quality Medicine,” American Health Lawyers Association, Physician Organizations, Vol. 9, Issue 2 (June 2006).
- “Hot Topics in Managed Care,” The American Association of Integrated Healthcare Delivery Systems (June 2006).
- “The FTC and Provider Networks: Collision at the Crossroads,” Chicago Bar Association, Antitrust Section (May 2003).
- “The Hospital Board at Risk and the Need to Restructure the Relationship with the Medical Staff: Bylaws, Peer Review and Related Solutions,” Loyola University Chicago School of Law, Annals of Health Law.
- “Lack of Proper Board Oversight Can Result in IDS Failure,” Integrated Health Care Delivery Systems.
- “The Emperor Has No Clothes,” Trustee Magazine. (July 2000).
- “How to End a Patient Relationship (Methodical Approach Needed for Treatment Termination),” American Association of Orthopedic Surgeons Bulletin.
- “Integrated Delivery System Formation and Continuation: A Critical Analysis,” University Health System Consortium.
- “Emerging Legal Issues,” Managed Care Quarterly.
- “Managed Care Under the Gun; Suing Your Managed Care Plans,” Managed Care Quarterly.
- “New Patient’s Rights: Providers Beware,” Managed Care Interface.
- “The Managed Care Market and the Anesthesiologist,” Illinois Society of Anesthesiologists Today.
- “Managed Care and the Law,” Direct Contracting & Hospital Managed Care.
- “Legal Issues in Accepting Capitation,” Physician Executive.
- “Forming PHOs for Direct Contracting,” Medical Group Management Journal.
- “Buying and Selling Hospital Care: Elements of Rational Managed Care Contracting,” Journal of Health and Hospital Law.