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Experience

Mackenzie S. Wallace is a trial attorney focused on healthcare, securities, antitrust, white collar, and general business and commercial litigation. She has extensive experience representing healthcare providers in coverage and reimbursement disputes; fraud, and civil RICO claims; Texas Prompt Pay Act, qui tam, and False Claims Act litigation; and matters relating to the violation of federal and state anti-kickback provisions and Stark laws. In addition, Mackenzie has expertise in working with clients on various aspects of white-collar criminal litigation, shareholder and securities litigation, corporate and shareholder rights, director and officer litigation, and merger litigation.

In addition, Mackenzie advises corporations and directors on various aspects of shareholder and securities litigation, corporate and shareholder rights, director and officer litigation, merger litigation, and white-collar criminal litigation.

 

Named to Top 50 Texas Women Up-and-Coming Attorneys by Texas Rising Stars® 2020

Named to Top 100 Texas Up-and-Coming Attorneys by Texas Rising Stars® 2020

  • Represents hospital and healthcare providers in managed care disputes with insurance companies, including Aetna, BlueCross BlueShield, Cigna, Humana, and UnitedHealthcare
  • Represented out-of-network healthcare providers in reimbursement litigation for services rendered to insured patients
  • Represented hospitals in litigation and compliance matters involving fraud and abuse allegations, qui tam actions, and reimbursement issues in several Texas cities; cases involve numerous federal and state health laws and regulations, including the federal anti-kickback statute, the federal physician self-referral law (also known as the Stark Law), and the federal False Claims Act
  • Represented health care providers in regard to investigations of audits and fraud.
  • Represented a national pharmaceutical company’s response to a Civil Investigative Demand and defense of alleged violations under the Texas Medicaid Fraud Prevention Act from the Texas Attorney General’s Office related to the company’s drug price reporting
  • Represented healthcare providers in fraud and civil RICO matters, both as plaintiffs and defendants
  • Representing a healthcare provider in matters related to a third-party subpoena in Federal Court
  • Representing a healthcare provider in responding to civil investigative demands (CIDs) from the federal government
  • Representing healthcare providers enforcing their rights under the Texas “prompt pay” statutes
  • Obtained a $65 million jury verdict in favor of the Life Partners Creditors’ Trust in a case against Life Partners’ founder and former CEO, its former general counsel and president, and various other entities related to a fraudulent scheme involving the sale of life settlements
  • Represented former NASDAQ-listed oil and gas company and former executives in lawsuits related to $4.4 billion tender offer and merger, including injunction and class certification hearings
  • Represented former board members of publicly traded oil and gas company over allegations of fraud, breach of fiduciary duty and fraudulent transfer
  • Represented NYSE-listed jewelry and bullion company in shareholder derivative suit and 10b-5 class-action alleging breaches of fiduciary duty and securities fraud
  • Represented privately owned animal feed company in relation to minority shareholder inquiries and threatened minority shareholder oppression claims
  • Represented accountant as individual witness in front of SEC and DOJ as part of government investigation into insider trading at a Fortune 500 company
  • Representing the Audit Committee of a Nasdaq-traded consumer goods and financing company in an independent investigation
  • Representing the Audit Committee of a Nasdaq-traded consumer goods and financing company in an independent investigation
  • Represented the Trustee in In re Life Partners Holdings, Inc., handling asset seizures and liquidation, investor claims and distributions, and third-party litigation to maximize the value of the debtor’s estate
  • Represented the Receiver in SEC v. BUCF, handling asset seizures and liquidation, investor claims and distributions, and third-party litigation to maximize the value of the Receivership Estate
  • Represented the Receiver in SEC v. Stanford International Bank, handling outside litigation
  • Represented the Receiver in SEC v. Millennium Bank, et al., handling investor claims and distributions and third-party litigation to maximize the value of the Receivership Estate
  • Represented putative class of independent retailers of higher education course materials in an antitrust suit against publishers and other retailers
  • Represented a manufacturer in direct and indirect purchaser putative class actions regarding an alleged conspiracy to fix prices
  • Represented a manufacturer in an adjudicatory proceeding before the Federal Trade Commission involving price-fixing allegations.
  • Advised numerous companies regarding antitrust policy and compliance matters

Prior Employment

  • Judicial Intern for the Honorable Martin Hoffman, 68th District Court, Dallas, Texas, 2010

Honors & Affiliations

Distinctions/Honors

  • One to Watch, The Best Lawyers in America® by Woodward/White Inc. (Commercial Litigation, Health Care Law), 2021
  • Rising Star, The Legal 500 US by Legalease (Dispute Resolution: General Commercial Disputes), 2019
  • Texas Rising Stars® by Thomson Reuters (Business Litigation), 2016-2020; Top 50 Texas Women Up-and-Coming Attorneys and Top 100 Texas Up-and-Coming Attorneys, Texas Rising Stars® by Thomson Reuters, 2019-2020
  • “Best Lawyers Under 40 in Dallas” by D Magazine, 2020

Memberships/Affiliations

  • Council Member, State Bar of Texas, Antitrust and Business Litigation Section, 2020-2023
  • Member, Dallas Bar Associations’ Women Empowered to Lead, 2020
  • Member, Federal Bar Association – Dallas Chapter; President, 2017-2018; President Elect, 2016-2017; Vice President, 2015-2016; Secretary, 2014-2015
  • Member, Dallas Association of Young Lawyers; Co-Chair, Ask-A-Lawyer Committee 2013-2016; Freedom Run Committee, 2013-2016; 2014 DAYL Leadership Class
  • Member, Texas Association of Defense Counsel (TADC); Young Lawyers Committee
  • Member, National Center for State Courts; Young Lawyer Committee
  • Member, Dallas Bar Association
  • Member, DRI-The Voice of the Defense Bar
  • Member, Women’s Energy Network
  • Member, Make-A-Wish Foundation; Dallas Area Regional Advisory Council; Founding Member, Young Leaders Council; Chair, Walk for Wishes, 2016
  • Member, Heroes for Children, Heroes and Handbags Host Committee, 2017
  • Member, Cattle Baron’s Ball, 2018

Education & Admissions

Education

  • J.D., 2011, cum laude, Baylor Law School; Articles Editor, Baylor Law Review; Dean’s List; Order of the Barrister; Quarterfinalist, Baylor University Dawson & Sodd Moot Court Competition; Baylor Law School Dean’s Scholarship
  • M.A., 2007, Baylor University; Graduate and Research Assistant Scholarship
  • B.B.A., 2007, cum laude, Baylor University; Business Excellence Scholarship Team (BEST); Dean’s List; Who’s Who Among American College Students; Delta Delta Delta

Admissions

  • Texas
  • U.S. Dist. Ct., E. Dist. Texas
  • U.S. Dist. Ct., N. Dist. Texas
  • U.S. Dist. Ct., S. Dist. Texas
  • U.S. Dist. Ct., W. Dist. Texas