Apparently Northwell Health in NY has been billing some people thousands of dollars for COVID tests. NYT article but it's paywalled.
"Ms. Roa’s coronavirus test bill is among 16 that The New York Times reviewed from the site. They show that Lenox Hill arrives at its unusually high prices by charging a large fee for the test itself - about six times the typical charge - and by billing the encounter as a “moderately complex” emergency room visit.
In one case, a family accrued $39,314 in charges for 12 tests this winter, all taken to fulfill requirements for returning to work or school. In another, an asymptomatic patient walked in because she saw the banner outside and wanted a test after traveling. Her insurance was charged $2,963."