Anthony J. Viorst

Photo of attorney Anthony J. Viorst

Practice Areas:

  • Medical Malpractice
  • Legal Malpractice
  • Misdiagnosis
  • Surgical Error
  • Nursing Error
  • Emergency Room Error
  • Brain Injury
  • Drugs & Medical Devices
  • Bad Faith Insurance
  • Battery
  • Civil Rights
  • Constitutional Law
  • Criminal Law
  • Embezzlement
  • Ethics & Professional Responsibility
  • Forgery
  • Litigation & Appeals
  • Assault
  • Motor Vehicle Accidents -- Plaintiff
  • Nursing Home
  • Personal Injury -- Plaintiff
  • White Collar Crimes
  • Sexual Assault
  • Traffic Violations
  • Birth Injuries


Anthony Viorst graduated Phi Beta Kappa from George Washington University and went on to receive his juris doctorate from Georgetown University in 1987, where he also served as editor for the Georgetown Law Journal. He has written numerous scholarly legal articles, on a variety of subjects, including medical malpractice, legal malpractice, and appellate law. Mr. Viorst has been named a Colorado Superlawyer every year for the past 15 years.

Mr. Viorst spent 10 years in the Colorado Public Defenders Office, where he tried over 100 cases, from DUI to murder. Since 2000, Mr. Viorst has also been practicing in the fields of personal injury, medical malpractice, legal malpractice, police brutality, and civil/criminal appeals.

Mr. Viorst's medical malpractice case, Preston v. Dupont, 35 P.3d 433 (Colo. 2001), was named the case of the year by the Colorado Trial Lawyers Association. More recently, Mr. Viorst wrote a comprehensive summary of Colorado legal-malpractice law for the Colorado Bar Association's Colorado Lawyer publication.

Mr. Viorst is licensed to practice in the Colorado state and federal courts, as well as the U.S. Supreme Court. He has the highest rating from his peers as independently reported to Martindale Hubbell.


  • Georgetown University Law Center, Washington, District of Columbia
    • Juris Doctorate - 1987
  • George Washington University
    • B.A. - 1984
    • Honors: Phi Beta Kappa

Bar Admission

  • Maryland, 1988
  • Colorado, 1989
  • District of Columbia, 1990
  • U.S. Court of Appeals 10th Circuit, 2003
  • U.S. Supreme Court, 2004

Published Works

  • The Colorado Lawyer
  • Trial - The Magazine of the Association of Trial Lawyers of America
  • “Liability for Post-Surgical Infection,” Trial (ATLA Journal) May 2004
  • “Recovery of Medical Expenses by Insured Medical Malpractice Victims,” Trial Talk (CTLA Journal), July 2004
  • “Appellate Standards of Review,” Trial Talk (CTLA Journal), May 2007
  • “The Loss of Chance Doctrine in Colorado,” Trial Talk (CTLA Journal), July 2007
  • “General Principles Relating to Hospital Liability,” Trial Talk (CTLA Journal), March 2009
  • “The Colorado Wrongful Death Act,” The Colorado Lawyer, May 2011
  • “Sovereign Immunity in Colorado - A Look at the CGIA,” The Colorado Lawyer March 2017
  • “Negligent Entrustment of Guns,” The Colorado Lawyer, June 2018
  • “Lawyer Negligence,” Trial Talk (CTLA Journal) February 2019
  • “Comparative Negligence in Medical Malpractice Cases,” Trial Talk (CTLA Journal) January 2020
  • “Suing Opposing Counsel,” Trial Talk (CTLA Journal) October 2020
  • “Colorado Legal Malpractice Law,” The Colorado Lawyer, April 2023

Representative Cases

  • Preston v. Dupont, 35 P. 3d 433, 2001, Colo. Supreme Ct., 2001948384
  • People v. Arroya, 988 P. 2d 1124, 1999, Colo. Supreme Ct., 1999263248


  • Colorado Trial Lawyers' Association, Case of the Year
  • Board of Governors, Colorado Bar Association
  • Board of Trustees, Denver Bar Association
  • Fellow, Colorado Bar Foundation
  • Board of Editors, Colorado Lawyer
  • Professionalism Award, Colorado Defense Lawyers Association, 2020

Pro-Bono Activities

  • Metro Volunteer Lawyers, 2001
  • Denver Bar Association, Community Action Network, 2003
  • B'Nai Havurah Synagogue School, Committee Chair, 2004

Representative Clients

  • Personal Injury Plaintiffs
  • Criminal Defendants


  • Spanish

Professional Associations

  • Denver Bar Association
  • American Association for Justice
  • Colorado Trial Lawyers Association
  • Board of Governors, Colorado Bar Association, 2003 to 2006
  • Board of Editors, Colorado Lawyer, 2005-2007, 2005 to 2008
  • Screening Subcommittee, Pro Bono Appeals Committee, 2011 to Present
  • Chairman, Colorado Bar Association Appellate Subsection , 2022 to 2023