Mark P. Hess



Mark Hess is a trial attorney whose primary focus is health care law.  He represents health care institutions and providers both in litigation and in administrative proceedings.

Mark also advises health care institutions and providers on regulatory, risk management and compliance issues. He had additional experience with civil law from a plaintiff’s perspective from his work during law school. Prior to law school, he worked as a consumer advocate for the Assistant Attorney General of Missouri on the National Mortgage Settlement. Mark earned his J.D. from Saint Louis University School of Law, receiving cum laude honors and multiple academic excellence awards. During law school, he was a 2017 ALA Moot Court Competition team member and the Vice President of the American Constitution Society Chapter of SLU Law. He was a member of the Jesuit honors society, Alpha Sigma Nu.

My Team

Administrative Assistant:
Claudia Stotler

A. Nikki Mohrmann

Practice Areas

  • Litigation
  • Health Care
  • Employment

Bar Admissions

  • Supreme Court of Missouri, 2018


  • Saint Louis University School of Law, St. Louis, Missouri
    • J.D. – 2018
  • DePaul University
    • B.A. – 2012
    • Major: Sociology

Professional Associations

  • American Bar Association
  • The Missouri Bar
  • Bar Association of Metropolitan St. Louis

Employment History

  • Lashly & Baer, P.C., Associate, 2018
  • Lashly & Baer, P.C., Law Intern, June – August 2017
  • Mandel & Mandel, LLP, Law Clerk, 2016 to 2018

Contact Our Attorneys Today

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Plan Your Visit

Lashly & Baer, P.C.


714 Locust Street

St. Louis, MO 63101

Map & Directions

Call: 314-621-2939

Fax: 314-621-6844


20 East Main Street
Belleville, IL 62220

Map & Directions

By Appointment Only
Call: 618-233-5587
Fax: 314-621-6844