Temple University Beasley School of Law, 1990
U.S. District Court for the Middle District of Pennsylvania, 2009
U.S. Court of Appeals for the Third Circuit, 2005
Supreme Court of the United States, 2006
U.S. District Court for the Eastern District of Pennsylvania, 1991
Admitted pro hac vice in other states
Mark W. Tanner primarily represents victims of medical negligence and insurance bad faith, and also has substantial experience in cases involving disability insurance claims, civil rights claims, catastrophic trucking and motor vehicle accident cases, and class action litigation. An accomplished trial attorney with a wide ranging practice, Mark has handled cases throughout the region and across the country, and has been appointed as a liaison counsel in mass tort litigation at both the state and federal court level. He has secured a $22.4 million verdict for the victim of a negligently executed spine surgery, one of the largest medical malpractice verdicts in Pennsylvania. Mark also secured a $7.9 million verdict, believed to be the largest jury verdict in Pennsylvania against an insurance company in a case alleging bad faith.
Mark has been recognized for seven consecutive years as one of the Top 10 Super Lawyers in Pennsylvania by Thomson Reuters. He is the former president of The Philadelphia Trial Lawyers Association (2007-2008) and the 2005 recipient of its President’s Award. In addition, Mark has been named by The National Trial Lawyers as a Top 100 Trial Attorney in the Civil Plaintiff category and in 2016 was appointed as a hearing committee member serving the disciplinary board of the Supreme Court of Pennsylvania. In recognition of his success at trial, Mark was also one of the youngest attorneys ever invited to become a fellow of the prestigious International Academy of Trial Lawyers (membership limited to 500 lawyers).
In additional to maintaining a robust practice, Mark is a passionate pro bono activist, representing underprivileged and neglected children as a child advocate for the non-profit Support Center for Child Advocates, where he has also served on the board of directors. As a frequent lecturer, Mark has participated in more than 50 continuing legal education programs, and has taught trial advocacy, among other subjects, to law students and graduate LL.M. students at local area law schools. He has lectured throughout the United States and, by invitation, to barristers in London.
When not in court, Mark enjoys traveling, hunting, fishing, and scuba diving, and he constantly struggles with his golf game.
Mark earned a B.A. in English Literature from the College of the Holy Cross, and his J.D. cum laude from Temple University Beasley School of Law. He is licensed to practice in Pennsylvania, the U.S. District Court for the Eastern District of Pennsylvania, the U.S. District Court for the Middle District of Pennsylvania, the U.S. Court of Appeals for the Third Circuit, and the Supreme Court of the United States.
Disciplinary Board of the Supreme Court of Pennsylvania
Hearing Committee Member , 2016
Commission on Judicial Selection and Retention
National Board of Trial Advocacy
Certified Civil Trial Specialist
Pennsylvania Trial Lawyers Association
Member, Board of Governors, 2009 – Present
Philadelphia Trial Lawyers Association
Member, President, 2007, Board of Directors, 1997 – Present
American Board of Trial Advocates (ABOTA)
Member, Associate, 2006
Philadelphia Bar Association
Member, Board of Governors, 2003 – 2006
National Trial Lawyers
Top 100 Trial Attorney in Civil Plaintiff Category
State Civil Rules Committee
Medical Legal Committee
Thomson Reuters, 2004 – 2017
Top 10 in Pennsylvania, 2007 – 2017
Best Lawyers in America
U.S. News and World Report, 2013 – 2018
Lawyer of the Year in Mass Tort Litigation / Class Actions – Plaintiffs – 2018
Mass Tort Litigation/Class Actions – Plaintiffs
Medical Malpractice Law – Plaintiffs
Personal Injury Litigation – Plaintiffs
Eddie Ohlbaum Distinguished Advocate for Children Award
Support Center for Child Advocates, 2016
International Academy of Trial Lawyers , 2006
Philadelphia Trial Lawyers Association, 2005
American Bar Foundation
Ohlbaum on the Pennsylvania Rules of Evidence
Advisory Board Member in Daniel J. Anders, LexisNexis, Mathew Bender, 2015
Lights, Cameras, Evidence
Pennsylvania Bar Institute, 2017
Litigating the Insurance Bad Faith Claim
Pennsylvania Bar Institute, 2017
Lights, Cameras, Evidence
Pennsylvania Bar Institute, 2015
Masters in Trial: A Trial Demonstration from Opening Statements through Jury Deliberation
American Board of Trial Advocates, Eastern Pennsylvania Chapter, 2014
Legal Issues in Emergency Room Cases
Pennsylvania Association for Justice, 2014
Proving Damages for the Client that ‘looks fine to me’
Pennsylvania Association for Justice, 2012
Beasley School of Law LLM Program, 2012
A View from Across the Aisle
Swartz Campbell Detweiller CLE 2011
Deposition Techniques/Hi-Tech Depositions and Their Use at Trial
Pennsylvania Association for Justice, 2011
Trial Strategy with Mongeluzzi, Stern & Tanner
Pennsylvania Bar Institute, 2011
Openings, Closings & Themes
Pennsylvania Association for Justice, 2010
Volunteers for the Indigent Program (VIP)
Support Center for Child Advocates
Advocate and Board of Directors
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