Mary Clare Bonaccorsi

Title/s:  Managing Partner, Polsinelli

Phone: 312.463.6310



Mary Clare Bonaccorsi serves as outside general counsel and trusted business adviser to health care and life sciences companies. Those clients include domestic and international medical equipment suppliers, specialty pharmacies, home care providers, home infusion providers, hospice providers, pharmacy benefit managers, academic medical centers, hospitals and health systems, ambulatory surgery centers, dialysis providers and pharmaceutical manufacturers.

As the Health Care Litigation Practice Chair, Mary Clare works closely with clients' legal and operational teams to devise and implement litigation avoidance strategies and provides counsel on operational, regulatory and compliance matters. She previously served as Deputy General Counsel to a publicly-traded home infusion provider and understands the importance of having a deep and practical understanding of clients' business operations and goals. She has successfully tried cases before judges and juries in state and federal courts throughout the country in cases involving shareholder disputes, breach of contract claims, unfair competition, Lanham Act, business torts and False Claims Act/qui tam claims. Mary Clare also handles government and commercial payor disputes, audits and investigations.

She utilizes a number of alternative dispute resolution mechanisms to resolve business disputes and takes a practical and holistic approach to solving clients' problems. Mary Clare chose the legal profession as a way to devote her time and skills to assist others and spends considerable time on pro bono matters. She is also a frequent industry speaker and author.


BA, cum laude, Philosophy – Colgate University (1986)
JD, Northwestern University School of Law (1989)

Courses Taught