• vcard
  • Education
    • J.D., South Texas College of Law, 1991
    • B.A., Baylor University, 1982, Psychology
  • Court Admissions
    • United States Supreme Court, 1998
    • U.S. Court of Appeals, Fifth Circuit, 1997
    • U.S. District Court, Western District of Texas, 1994
    • U.S. District Court, Southern District of Texas, 1992
    • U.S. District Court, Northern District of Texas, 1994
    • U.S. District Court, Eastern District of Texas, 1994
    • State of Texas, 1991

Mark Armstrong provides practical advice and innovative solutions to complex compliance issues resulting from day-to-day operational challenges. He conducts compliance investigations and defends clients undergoing government or commercial audits and investigations initiated by the Department of Justice, the Department of Health and Human Services Office of the Inspector General, and other state and federal governmental authorities and licensing agencies. Mark also advises clients nationwide on state and federal regulatory compliance and licensing issues, including telehealth.

Mark represents a wide range of clients, including:

  • Academic medical centers
  • Health systems
  • Hospitals
  • Pharmaceutical wholesalers
  • Pharmacies (including retail, institutional, mail order, infusion and specialty)
  • Pharmacy benefit managers
  • Physician practices

Prior to earning his law degree, Mark worked for a large pharmaceutical manufacturer, giving him first-hand experience to navigating the rules and regulations of the health care industry.  Mark has also completed extensive training in dispute resolution as a mediator and arbitrator.

In addition to his legal practice, Mark is a native Houstonian and remains active in the Houston community, where he serves as a community member on the Committee for the Protection of Human Subjects, an Institutional Review Board, and the Institutional Conflict of Interest Committee for The University of Texas Health Science Center at Houston. Mark further serves as an Adjunct Professor at the University of Houston Law Center, where he teaches FDA law, and is a member of the Board of Directors of a Federally Qualified Health Center that offers pediatric and adult health care services for the medically underserved and uninsured in Houston’s East End community.

  • Represents clients with issues concerning state, federal and commercial reimbursement, including challenges to regulatory actions and disputes under government and commercial payor contracts. 
  • Conducts compliance investigations and advises a broad range of clients, including hospitals, pharmaceutical companies, pharmaceutical wholesalers, pharmacies and managed care organizations, pharmacy benefit managers, and physician practices on compliance matters. 
  • Defends clients undergoing investigation for health care fraud by the Department of Justice, the Department of Health and Human Services Office of the Inspector General, and other state and federal governmental authorities. 
  • Represents academic medical centers in suits brought by faculty members.
  • Advises and counsels managed care organizations on a broad variety of issues, including developing and implementing an ACO strategy.
  • Represents health care providers and suppliers during administrative hearings before state licensing boards.
  • Advises and counsels clients on peer review issues, medical staff appointments, and clinical privilege delineation for physicians and allied health professionals.
text icon Publications & Presentations
Legal Matters: Expanding Medicare's Settlement Conference Facilitation Program
Co-Author, Houston Medical Times
August 2018
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OIG Advisory Opinion Allows Waiver of Cost Sharing in Research Studies
September 2017
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Five Key Provisions to the OIG’s New Exclusion Rules
Author, Houston Medical Times
February 2017
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Highlights of the 2017 OIG Work Plan
Author, Houston Medical Times
January 2017
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CMS Increases the Use of Revocation as an Enforcement Tool
Author, Houston Medical Times
October 2016
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Five Tips for Enhancing Compliance with the HIPAA Rules
Author, Houston Medical Times
August 2016
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Five Things Providers Should Know About CMS’s Final Rule Regarding Reporting and Returning
Author, Houston Medical Times
March 2016
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Handguns and Healthcare What Texas Providers Should Know
Author, Houston Medical Times
January 14, 2016
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The Future of Research Using Electronic Medical Records Data
Co-Author, Houston Medical Times
October 2015
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Terminally Ill Patients in Texas Now Have the “Right to Try”
Author, Houston Medical Times
July 2015