Tim McCormack is an attorney with Preti Flaherty’s Litigation Practice Group in the Portland, Maine, office. He has extensive experience representing whistleblowers in “qui tam” lawsuits brought under the Federal and various state False Claims Acts, claims made under the Internal Revenue Service, Securities and Exchange Commission and Commodities Futures Trading Commission’s whistleblower programs. His clients have successfully helped recover hundreds of millions of dollars at the state and federal level.

Highly sought after for his subject matter knowledge, Tim is a frequent author and speaker on issues related to health care reimbursement and coding, provider contracting, commercial and government managed care programs (including Medicare Advantage risk adjustment fraud), the Stark and Anti-Kickback laws, and the use of data and analytics in the detection and remediation of fraud. He is a pioneer in identifying fraud in the Medicare Managed Care/Medicare Advantage program involving upcoding of patient diagnoses in the risk adjustment/risk scoring program.

Tim is a graduate of the University of Maine School of Law and Harvard University. While in law school, he served as Editor-in-Chief of the Maine Law Review and held clerkships with the Honorable D. Brock Hornby of the U.S. District Court for the District of Maine and the Honorable Fred I. Parker of the U.S. Second Circuit Court of Appeals. Following law school, Tim served as a policy advisor for labor, agriculture, forestry, and veterans’ issues for U.S. Senator Susan M. Collins.

With nearly two decades of experience as an attorney, Tim joins Preti Flaherty following several years at a notable law firm in Maine and partnerships at two prominent law firms in Washington, D.C. 

Tim lives in Yarmouth.

Professional Activities

  • Edward T. Gignoux Inns of Court
  • Maine Association of Mediators
  • Taxpayers Against Fraud

Civic and Charitable Activities

  • Community Mediation: Serve as mediator for public interest mediation through the Maine Agricultural Mediation Program, the Family and Community roster and the Maine Court Alternative Dispute Resolution Service.

Honors & Recognition

  • Washington’s Best Whistleblower Lawyers, Washingtonian Magazine

Firm Highlights


Maine Workers’ Compensation Update - November 2023

The following is an overview of developments with respect to proposed legislation as well as new procedures on independent contractor determinations, medical fee schedule updates, and the use of updated Board forms, including medical...


November 7, 2023 Election Results

Maine’s November 2023 statewide elections were exclusively referendum questions, four were citizen initiatives, and four were proposed amendments to the Maine Constitution. Of these, Questions 5, 7 and 8 were placed on the ballot...


Remembering Preti Flaherty Founder Robert F. Preti

We at Preti Flaherty are deeply saddened by the passing of one of our founding partners and longtime friend, Robert Preti. Bob was not just a part of our firm; he was a part...

Press Coverage

Maine Center for Public Interest Reporting Wins Public Records Dispute with York County Jail


Preti Flaherty Welcomes Employment Law Attorney Brooke K. Haley to the Firm

Preti Flaherty is pleased to announce that attorney Brooke K. Haley has joined the firm’s Employment Law Practice Group as a Partner. Brooke will work primarily from the firm’s Portland office. Brooke’s practice centers...


Eric Osterberg Presents Webinar on IP Rights and Infringement With Podcasts and Livestreaming

Eric Osterberg joins a panel of industry experts to present “IP Rights and Infringement With Podcasts and Livestreaming.” The panel focuses on guiding intellectual property counsel on the IP issues that arise when creating...


FRBP 9006 Doesn't Take Vacations

Bodie Colwell of Preti Flaherty’s Creditors' Rights & Bankruptcy Group, has authored the article "FRBP 9006 Doesn't Take Vacations," appearing in the October 2023 issue of the American Bankruptcy Institute's Young & New Members Committee newsletter...

Press Coverage

Maine Media Organizations Oppose Foreign Electioneering Ban

Question 2 on Maine’s November ballot asserts that corporations owned or controlled by foreign governments do not have the same rights to political speech as companies here in the U.S. and that foreign governments should be prohibited...


David Van Slyke Reappointed by Governor Mills to New England Interstate Water Pollution Control Commission

Van Slyke is one of five Commissioners from the state of Maine overseeing NEIWPCC PORTLAND—Preti Flaherty’s Managing Partner, David Van Slyke, has been reappointed by Governor Janet T. Mills to the New England Interstate...

Press Coverage

Bangor Releases Unredacted Files on Effort to Close Homeless Encampment

Following a five-month effort by local media, represented by attorney Sigmund Schutz, chair of Preti Flaherty's Media Law Practice Group, the City of Bangor finally released unredacted records related to its attempts to close a...