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USA Guide
Individual Profile

John P Marren

Hogan Marren Babbo & Rose, Ltd - Chicago

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  • 321 North Clark Street
  • Chicago, Illinois, USA
  • IL 60654

Profile submitted by John P Marren

Practice Areas



John P. Marren is a founding partner of the firm with more than 30 years experience in health care and general corporate, not-for-profit and transactional law. He is recognized as a national expert in managed care, Accountable Care Organization (ACO) development and other hospital/physician alignment strategies. Mr. Marren has consistently been listed as a leading lawyer in Chambers USA in Healthcare and is recognized for having “pioneered managed care legal issues” and for “significant involvement in structuring clinically integrated provider networks” as well as his expertise in “antitrust compliance matters.” Mr. Marren has provided legal leadership in the formation of hospital affiliations, systems and networks, physician/hospital affiliations, ACOs PHOs, and development of HMOs and PPOs and has worked with the Illinois Department of Insurance to develop regulations. Mr. Marren is currently active in assisting providers in the formation of creative relationships among physicians, hospitals, and payors.


“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).


Loyola University School of Law (JD); St. Xavier University (BA, Psychology and Biology). Admissions: Illinois (1983) U.S. District Court, Northern District of Illinois