Lewis, Thomason, King, Krieg & Waldrop, P.C.

Mark Castleberry

Mark Castleberry is a shareholder based in the firm’s Knoxville office and has a varied litigation-based practice in the areas of product liability defense, health care law to include medical malpractice and long-term care defense, commercial/business litigation, and professional liability defense. Mr. Castleberry has extensive experience as lead counsel representing numerous clients in complex, high exposure litigation in trial courts in both state and federal courts, at mediation, at arbitration, and on the appellate level.


As a former high school teacher and coach, Mr. Castleberry remains actively involved in his community through his continued involvement with area athletic programs, through his service with the Knoxville and Tennessee Bar Associations, and through his involvement with his local church and with various organizations, including JDRF and Autism Speaks. He currently serves on the board of directors for the Autism Society of East Tennessee.


  • ALFA International
  • American Bar Association
  • Knoxville Bar Association
  • Tennessee Bar Association


  • Named to The Best Lawyers in America©, Medical Malpractice – Defendants
  • ALFA International Steering Committee for Product Liability Practice Group
  • Board of Directors, Autism Society of East Tennessee
  • Chair, Functions Committee of the Knoxville Bar Association
  • Member, American Inns of Court Hamilton Burnett Chapter
  • Member, Public Education Committee, Tennessee Bar Association
  • Graduate, Tennessee Bar Association Leadership Class, 2012
  • Named by Super Lawyers ® a Mid-South Rising Star, 2012- 2015

Best Lawyers Award Badge

Knoxville Office

One Centre Square, Fifth Floor
620 Market Street
Knoxville, Tennessee 37902
Telephone (865) 546-4646
FAX (865) 523-6529


University of Tennessee, B.A., 1995

Carson-Newman College, Master of Arts in Teaching, 1997

Universtiy of Tennessee College of Law, J.D., 2005

Bar Admission

Tennessee, 2005

Kentucky, 2015

U.S. District Court, Eastern District of Tennessee

  • Health Care Law

    Lewis Thomason has extensive experience in providing services to clients in the health care industry at a time when the mission is to deliver excellent patient care while dealing with increased regulatory authority and government oversight. We offer comprehensive legal counsel and compliance with complex and evolving privacy and security requirements… [Read more]


    We have more than four decades of experience providing counsel and legal defense to insurance companies, self-insured clients, businesses and individuals. The firm has represented thousands of insured clients of leading insurance companies in a wide range of cases and has represented insurers in cases involving coverage disputes, policy interpretation,… [Read more]

    Product Liability

    Over the past 25 years, manufacturers and insurance companies have faced an explosion of product liability claims. In addition to significantly impacting business finances, product liability claims can lead to adverse publicity, government regulation, class actions and individual claims involving serious injury or property damage, as well as potential exposure… [Read more]

    Professional Liability

    As a professional, your reputation means everything. We are sensitive to the fact that professional liability lawsuits and claims affect reputations, as well as personal finances, and we stand ready to aggressively protect your practice at both the trial and appellate levels. Representative clients include: Accountants Attorneys* Architects Contractors Directors of Corporations Engineers Financial Advisors Hospitals and Medical Facilities Insurance… [Read more]