Mark M. Brennan


Mark M. Brennan is a co-founder of Brennan Burtker LLC where he serves as Managing Partner and Chairman of the firm’s Executive Committee. Previously, he practiced 22 years at a large litigation firm where he was a senior capital partner, an elected member of its Executive Committee, and Chairman of its Healthcare Law Practice Group before moving his entire practice to Brennan Garvey LLC, now known as Brennan Burtker LLC. Brennan Burtker LLC was named a Regional Tier 1 Best Defense Firm for Medical Malpractice in Illinois by U.S. News & World Report.

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. He represents some of the Chicago’s top children’s hospitals and pediatric specialists and has defended some of the most complex and highest profile cases filed against academic medical institutions.

Mr. Brennan’s defense of highly complex and high exposure medical malpractice cases for academic medical centers has been invaluable to the protection of the healthcare industry.  In addition to his impressive trial record, which most recently includes a defense verdict in a devasting neurologic injury case where the jury was asked to award nearly $50 million, his creative defense strategies and careful client guidance have rightfully protected tens of millions of dollars in reserves and assets exposed in the cases he defends with the utmost integrity.  His clients have recognized him for consistently having the very best results in the healthcare industry in the defense of medical malpractice claims.

In addition to his litigation practice, Mr. Brennan serves as a consultant to many Chicago area hospitals on matters ranging from evolving health care law on HIPAA, quality assurance, consent and other regulatory compliance issues to trends in health care law and medical device litigation. Mr. Brennan has been honored yearly for his accomplished career by the publications Super Lawyers, Leading Lawyers and The Healthcare Lawyers. 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 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 that pertain to children in the health care setting, and on legal privileges such as the Medical Studies Act, HIPAA, and the physician-patient privilege at hospitals and seminars for lawyers.


Loyola University Chicago School of Law, J.D.
DePaul University, M.A., summa cum laude
DePaul University, B.A., cum laud


Supreme Court of Illinois, 1993
U.S. District Court, Northern District of Illinois, 1993

Memberships & Affiliations

American Bar Association
Chicago Bar Association
Illinois State Bar Association

About Us

Brennan Burtker LLC is Chicago’s first full service health care law firm, providing clients everything from defense litigation to health care compliance services. Our partners are established and recognized defense litigation attorneys with an in-depth understanding of the day to day issues facing health care professionals and institutions.

Contact Us

20 N Clark St, Suite 1800, Chicago, IL 60602

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