John A. Markus

Top rated Medical Malpractice attorney in Columbus, Ohio

Leeseberg Tuttle
John A. Markus
Leeseberg Tuttle

Practice Areas: Medical Malpractice, Personal Injury; view more

Licensed in Ohio since: 2015

Education: University of Cincinnati College of Law

Selected to Rising Stars: 2020 - 2024
Free Consultation

Leeseberg Tuttle

175 South Third Street, Penthouse One
Columbus, OH 43215 Visit website


John A. Markus has been an associate at Leeseberg Tuttle since October 2015. Based in the firm's office in Columbus, Ohio, he focuses his practice exclusively on personal injury and wrongful death litigation, representing clients throughout the state, and he is admitted to practice before all Ohio state courts and the Southern District of Ohio.

In his practice, Mr. Markus provides aggressive representation to people who have incurred economic and noneconomic losses due to the negligence or recklessness of other parties. He places a particular emphasis on medical malpractice cases, including those involving surgical errors, medication mistakes, and misdiagnoses. Other types of matters that Mr. Markus has handled during his career have included motor vehicle accidents and defective products, and he has been able to obtain significant compensation for his plaintiff clients, both through jury awards and settlements that he has negotiated out of court with defendants and their insurance companies.

Majoring in political science, Mr. Markus attended The Ohio State University in Columbus as an undergraduate. While he was there, he was the vice president of a student-run community service organization and served as a public safety associate for the Cincinnati Reds major league baseball franchise before obtaining his Bachelor of Arts cum laude in 2011. After graduation, Mr. Markus worked as a fiscal associate for his alma mater before deciding to pursue a legal education. He then enrolled at the University of Cincinnati College of Law, and he was a member of the school's Trial Practice team and Moot Court Honor Board, and was a judicial extern for a judge on a Hamilton County court before being awarded his Juris Doctor in 2015. His professional memberships include the Central Ohio Association for Justice, where he serves as a Director and the Medical Malpractice Committee Chair, as well as the Ohio Association for Justice, Ohio State Bar Association, and the Columbus Bar Association.

Practice areas

Personal Injury - Medical Malpractice: Plaintiff, Personal Injury - General: Plaintiff

Focus areas

Animal Bites, Brain Injury, Delayed or Incorrect Diagnosis, Dental Malpractice, Informed Consent, Medical Malpractice, Motor Vehicle Accidents, Sexual Abuse - Plaintiff, Trucking Accidents, Wrongful Death

  • 70% Personal Injury - Medical Malpractice: Plaintiff
  • 30% Personal Injury - General: Plaintiff

First Admitted: 2015, Ohio

Professional Webpage:

Special Licenses/Certifications:
  • Licensed to practice law in the State of Ohio, 2015-present
Pro bono/Community Service:
  • Gifts For Good Foundation, Vice-President, 2023-present
  • The Ohio Innocence Project, 2013 - 2014
  • High School Mock Trial, Coach, 2015 - 2016 
Scholarly Lectures/Writings:
  • Baldwin's Ohio Practice: Tort Law 2d, West, December, 2015 
Educational Background:
  • The Ohio State University, Bachelor of Arts cum laude - 2011, Honors: Dean's List, Major: Political Science 
  • University of Cincinnati College of Law, Cincinnati, Ohio, Honors: University Award, Order of the Barristers, Dean's List, Law Journal: Ohio Tort Law Journal, 2014 - 2015 
  • Jury verdict of $44.5 million in case involving the failure to timely diagnose and treat a 9-yaer-old boy's ear infection, which subsequently spread to his brain resulting in a severe brain stem herniation causing him to suffer from "locked-in" syndrome, Metts v. Athens Medical Lab, Franklin County, Ohio, 2018
  • Jury verdict for $880,680 in medical malpractice case alleging radiologist failed to diagnose fracture of the cervical spine in 76 year old man, Nielson v. Riverside Radiology Interventional Associates, Inc., Franklin County, Ohio, 2023
  • Received the Louisville Slugger Award for "knocking one out of the park" for justice in recognition of our firm's $44.5 million jury verdict in Metts v. Athens Medical Lab., COAJ Louisville Slugger Award, Central Ohio Association for Justice, 2019
Bar/Professional Activity:
  • Barrister's Leadership Program, Columbus Bar Association, 2020
  • Central Ohio Association of Justice, Director, Medical Malpractice Committee Chair
  • Columbus Bar Association, Member
  • Ohio Association of Justice, Member
  • Ohio State Bar Association, Member
  • Ohio, 2015 

Office location for John A. Markus

175 South Third Street, Penthouse One
Columbus, OH 43215

Phone: 855-445-6266


5 Years Rising Stars
  • Rising Stars: 2020 - 2024

Additional sources of information about John A. Markus

Attorney resources for John A. Markus

Page Generated: 0.20950984954834 sec