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.

Education

  • Baylor University (B.A., 1982)
    • Psychology
  • South Texas College of Law (J.D., 1991)

    Bar Admission

    • Texas, 1991

    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

    Professional Affiliations

    • American Health Law Association
    • Houston Bar Association
    • Health Care Compliance Association

    Recognition

    • Selected for inclusion in Best Lawyers in America® for Health Care Law, 2026
    • AV Preeminent® rated by Martindale-Hubbell
    • Ranked in Chambers USA: America's Leading Lawyers for Business, HealthcareTexas, 2021-2025