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About John Markus
John A. Markus is a partner at Leeseberg Tuttle in Columbus, Ohio, where he has focused on medical malpractice and catastrophic personal injury litigation since joining the firm in October 2015. He earned a Bachelor of Arts cum laude in political science from The Ohio State University in 2011 and a Juris Doctor from the University of Cincinnati College of Law in 2015, where he was inducted into the Order of the Barristers and published in the Ohio Tort Law Journal. He is licensed in Ohio and admitted before all Ohio state courts and the United States District Court for the Southern District of Ohio. Mr. Markus was co-counsel on the Metts v. Athens Medical Laboratory matter that produced a $44.5 million jury verdict in 2018.
He also obtained an $880,680 jury verdict in 2023 in a radiologist failure-to-diagnose case. Super Lawyers has recognized him on its Ohio Rising Stars list since 2020. He received the Central Ohio Association for Justice Louisville Slugger Award in 2019.
Proven verdicts and settlements
A Franklin County jury awarded $44.5 million to a southeastern Ohio boy left with locked-in syndrome after Athens Medical Laboratory took six days to report markedly abnormal STAT blood tests, and the trial court then refused to apply Ohio's noneconomic damages cap, holding it unconstitutional as applied.
Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.
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