Mark M. Brennan: Lawyer with Cassiday Schade LLP

Mark M. Brennan

Chicago,  IL  U.S.A.

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Practice Areas

  • Commercial
  • Healthcare
  • Professional Liability
  • Medical Liability
  • Product Liability
University DePaul University, B.A., cum laude, 1989; DePaul University, M.A., summa cum laude, 1990
Law SchoolLoyola University Chicago School of Law, J.D., 1993
Admitted1993, Illinois; U.S. District Court, Northern District of Illinois

Memberships and Affiliations
•American Bar Association
•Chicago Bar Association
•Illinois State Bar Association


Mark M. Brennan is a partner in the firm's Chicago office, an elected member of the Executive Committee, and chairman of the firm's Healthcare Law Group. He is a member of the American Bar Association, the Illinois State Bar Association, the Chicago Bar Association and various bar committees and sections pertinent to his areas of practice. Mr. Brennan was also selected in 2014 as a Leading Lawyer, as compiled by the Law Bulletin Publishing Company, in health law and medical malpractice defense law.

Mr. Brennan devotes his law practice to civil litigation and issues pertinent to the health care profession. He has successfully tried several cases to verdict. Mr. Brennan concentrates his trial practice in the area of medical malpractice defense but also represents physicians and hospitals in all areas of litigation involving commercial, administrative and personal tort matters, and manufacturers of medical devices. He represents some of the Chicago's top children's hospitals and pediatric specialists.

In addition to his litigation practice, Mr. Brennan serves as a consultant to many Chicago area hospitals on matters ranging from evolving health law pertaining to HIPAA, quality assurance, consent and other regulatory compliance issues to trends in medical malpractice law and medical device litigation. He also has a transactional practice that includes contract formation of medical practice groups for physicians, and a general commercial litigation practice.

Mr. Brennan is the author of Legal Issues Involving Children - A Hospital's Guide and Jury Selection: A Defendant's Perspective. Mr. Brennan has also lectured and authored numerous papers dealing with issues of consent and confidentiality as they pertain to children in a health care setting and hospital law at various Chicago area hospitals. In addition, Mr. Brennan has lectured on legal privileges in the context of medical malpractice actions including the Medical Studies Act, HIPAA and the physician-patient privilege at hospitals and various bar association seminars for lawyers.

Resource Updates and Publications
Settling Wrongful Death Actions: The Illinois Supreme Court Expands the Rights of Intended Beneficiaries
June 30, 2014
The Amendment to the Illinois Health Care Services Lien Act: To Lien or Not to Lien
September 20, 2013

News and Press Releases
Settling Wrongful Death Actions: The Illinois Supreme Court Expands the Rights of Intended Beneficiaries
June 30, 2014
Cassiday Schade LLP Elects Brown, Hackett and Hennig, and Re-elects Brennan and Boylan to Executive Committee
November 22, 2013
Cassiday Schade LLP Elects Brennan and Garvey to Executive Committee
November 21, 2011

Camarra and Brennan Win Not Guilty Verdict in $55 Million Medical Malpractice Case Involving Brain Damage
Summary Judgment Granted to Brennan in Complex Commercial Litigation Suit
Not Guilty Verdict in $8.75 Million Medical Malpractice Case Alleging Wrongful Death
Not Guilty Verdict in Medical Malpractice Case Alleging Neurosurgical Malpractice


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Office Information

Mark M. Brennan

20 North Wacker Drive, Suite 1000
ChicagoIL 60606-2903


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