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312.463.6226
  • Education
    • J.D., cum laude, Notre Dame Law School, 2013, Notre Dame Journal of Law, Ethics and Public Policy, Editor-in-Chief
    • B.A., magna cum laude; Phi Beta Kappa, University of Notre Dame, 2010
  • Court Admissions
    • U.S. District Court, Northern District of Illinois, General Bar, 2013

Colleen Walter represents health care providers in False Claims Act litigation, Medicare and Medicaid reimbursement disputes, DOJ investigations, billing and coding audits, and a variety of other disputes within health care litigation.  Colleen also has experience handling a broad range of commercial litigation matters in state and federal court, including alleged violations of the Fair Credit Reporting Act, breach of contract disputes, fraud and other tort claims.

Colleen assists with all aspects of litigation, including pleadings, written and electronic discovery, depositions and a wide range of motion practice. She also has experience preparing cases for trial and significant arbitrations.  From 2017 to 2019, Colleen served as a law clerk to the Honorable M. David Weisman of the United States District Court for the Northern District of Illinois. While at Notre Dame Law School, she was Editor-in-Chief of the Notre Dame Journal of Law, Ethics & Public Policy and received her mediation certification through the Notre Dame Mediation Clinic where she provided mediation services to individuals litigating civil and domestic relations matters, including child custody, support and parenting time.

  • Represented hospital in $85 million dispute pertaining to a management services agreement. Assisted with all aspects of the arbitration, including defeating a motion for preliminary injunction, drafting written discovery, leading a document review team, working with witnesses, and preparing for depositions and trial.
  • Represented pharmacy benefit manager seeking to recover nearly $15 million in damages from the administrator of its discount cash card program. Assisted with all aspects of the arbitration, including electronic discovery, depositions, and witness preparation prior to trial.
  • Represented Medicare-enrolled supplier of durable medical equipment against alleged violation of federal and state anti-kickback laws. Assisted with responding to a HIPAA subpoena and Civil Investigative Demand issued by the US Department of Justice.
  • Represented multiple clients in responding to Subpoenas Duces Tecum and Civil Investigative Demands issued by state and federal government entities in investigations relating to the health care industry, including matters regarding pricing, charge-backs, credits, and referral relationships.
  • Defended a large educational institution against False Claims Act allegations related to the use of government grants.
  • Defended a government hospital against allegations of fraud under the False Claims Act brought by a qui tam relator.
  • Represented assisted living facilities in claims against the state for failure to provide an administrative hearing.
  • Represented two major sports conferences in a class action that challenged NCAA rules related to student-athlete financial aid.
  • Obtained the denial of a requested class action, and then obtained summary judgment on behalf of a consumer reporting agency in a Fair Credit Reporting Act (“FCRA”) class action brought in the Northern District of Illinois.
  • Defended consumer reporting agency client in Eastern District of Virginia putative class action alleging various violations of the FCRA, including allegations of impermissible purpose and unreasonable procedures, as well as allegations of failure to investigate under Section 1681(i) and failure to disclose required information under Section 1681(g). Team filed opposition to motion for class certification and negotiated favorable settlement during mediation before a ruling on class certification.