The issue at hand in the article is the amount being charged to insurance companies for the latter - due to lobbying and obscure regulations (which the article points out the Trump administration attempted to overcome), it is not uncommon for medical providers to charge insurance companies exorbitant amounts for services, and also charge them for unnecessary services.
> The Families First Coronavirus Response Act ensures that COVID-19 testing is free to anyone in the U.S., including the uninsured.
https://www.hhs.gov/coronavirus/community-based-testing-site...
The issue here is these testing sites were performing more than a covid 19 test and then billing for those tests without a person's consent.
> Dr. Murphy wasn’t just billing for coronavirus tests, as his patients thought. He was billing for 20 other respiratory pathogens, too.