Mayo Clinic revenue was up for 2020 with the help of $182 million in CARES funds Mayo Clinic released its 2020 financial report today, which showed total revenue of $13.9 billion was up 1.5 percent from 2019. The net operating income was $727 million, down from the record $1 billion reported in 2019. Net medical service revenue declined to $11.5 billion from $11.6 billion in 2019, but revenue from Mayo Clinic Laboratories and Mayo Clinic Ventures more than made up the difference. Written By: Jeff Kiger | × Mayo Clinic publicly reported its “Unaudited Condensed Consolidated Financial Reports” for the second quarter and the first six months of 2020 filed with the Municipal Securities Rulemaking Board.