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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 LLC COVID-19 Response

HeplerBroom has been diligently working on its response and continuity plan to the COVID-19 pandemic in order to keep the health and safety of our employees, their families, and our clients as our top priority.

To help ensure everyone's continued health and well-being, effective March 17, 2020, all attorneys and staff began working remotely. We continue to assess the situation and will return to our physical offices when appropriate.

To ensure this, the firm has identified essential personnel in each office who will make certain that critical firm functions that cannot be done remotely continue to be handled. We have put in place protocol for those essential personnel to make sure they are keeping healthy per the CDC cleaning and sanitizing recommendations. All teams have back-up personnel and procedures that we will follow to make sure all deadlines are met and clients receive the same great service and work product that we have always been proud to provide.

HeplerBroom's IT department has been working hard to make sure all remote employees are set up with equipment and access from home to limit disruption to our clients. Maintaining security and confidentiality has remained, and will continue to remain, at the forefront of all processes and procedures, at all levels throughout the firm.

The firm has created emergency communication measures to communicate any changes to this plan to employees and are communicating on a regular basis with any and all new resources and helpful information during this uncertain time.

During these fluid and unpredictable times, HeplerBroom will continue its commitment to great service and results for our clients, all while keeping safe and healthy.

Wishing you and your families good health.

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