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Chicago, IL



  • Southern Illinois University School of Law, J.D., magna cum laude, 1993
  • University of Illinois, B.A. in History, 1991


  • Illinois
  • Missouri
  • U.S. District Court for the Northern District of Illinois

Practice Description

Mary N. Nielsen focuses her practice on the defense of health-care providers, including physicians, nurses, nurse anesthetists, and physical, occupational, and speech therapists. She defends clients in a wide variety of specialties, including:

    ● critical care ● orthopedics
    ● emergency room medicine ● pulmonology
    ● infectious disease ● radiology
    ● internal medicine ● urology
    ● neurology  

She also defends long-term care facilities and has significant experience defending not-for-profit agencies running residential and day programs for disabled and mentally ill adults and children, rehabilitation centers, and therapeutic day schools.

Ms. Nielsen has engaged in multiple mediations and settlement conferences. Her trial experience includes numerous first chair verdicts and spans multiple counties in Illinois.

Professional Associations

  • Chicago Healthcare Risk Management Society
  • DuPage County Bar Association
  • Women’s Bar Association of Illinois

Law School Honors/Involvement

  • National Moot Court team

Legal Lectures & Presentations

  • Speaks at Grand Rounds, staff and resident meetings, and at-risk management conferences on:
    • Consents
    • Anatomy of a malpractice case
    • Strategies to avoid or mitigate litigation exposure
    • Current developments in case law
    • Litigation trends

Representative/Recent Case Results

  • Defense verdict. Represented cardiothoracic surgeon in medical malpractice case where patient died during surgery for lung cancer. Sought: $7,300,000; awarded $0. (Estate of Ronald Green, deceased v. Dr. Norman Snow)
  • Defense verdict. Represented third-year otolaryngology surgery resident in medical malpractice case alleging child given medication overdose during a tonsillectomy and adenoidectomy. Sought: $7,000,000; awarded $0. (Zaki Mohamed, minor v. Dr. Nadia Gul Mohyuddin)
  • Defense verdict. Represented hospital, two residents, and a physician’s assistant in medical malpractice case alleging pregnant woman died from insulin overdose. Sought: $2,500,000. Awarded $0. (Estate of Ella Jackson, deceased, Estate of Baby Girl Jackson, deceased minor v. Michael Reese Hospital)
  • Plaintiff verdict. Represented medical center in medical malpractice case alleging negligence in plaintiff’s wheelchair fall inside hospital’s transport van. Sought: $2,000,000; awarded $350,000. (Estate of Ferdinand Timmreck, deceased v. Resurrection Medical Center)
  • Defense verdict. Represented physical therapist in medical malpractice case involving a broken leg during transfer at a nursing home. Sought: $1,000,000; awarded $0. (Estate of Alice Yerbick, deceased v Alden-Northmoor Rehabilitation & Health Care Center Inc., Tammy Palese, Dr. Stanislaw Maslanka)
  • Plaintiff verdict. Represented hospital in medical malpractice case alleging failure to timely diagnose infant’s necrotic bowel. Sought $10,250,000; awarded $2,970,000. (Estate of Isabella Kitsen Zormelo, deceased minor v Edward Hospital, Dr. Michael J. Fitzgerald, Dr. Leslie Farolan, Dr. Deanna L. Holleman-Duray, Dr. Robert F. Covert, Dr. Rajeev S. Dixit, DuPage Neonatology Associates S.C.)


HeplerBroom is pleased to announce that its physical offices have reopened. While the health and safety of our clients, employees, and families, remain our top priority, HeplerBroom attorneys and staff are returning to our offices on full-time or modified schedules. Our offices are open to visitors and clients with scheduled appointments, with appropriate screening of visitors and social-distancing protocols. HeplerBroom will continue to follow CDC recommendations for cleaning and sanitizing.

We are very proud of the dedicated efforts of our attorneys and staff to provide great service and work product to our clients during the pandemic. This would not have been possible without the incredible support provided by the HeplerBroom IT Department and other essential personnel who supported our personnel and clients from the office locations while the rest of our teams worked remotely.

If you have questions about visiting our offices, please do not hesitate to contact us. We look forward to seeing you in person again in the near future.