1. COVID-19 tests drove an increase in total Medicare Part B spending on lab tests in 2020, while use of non-COVID-19 tests decreased significantly Publication: Washington, D.C. : U.S. Department of Health and Human Services, Office of Inspector General, December 2021 Subject(s): Clinical Laboratory Techniques -- economicsCOVID-19 Testing -- economicsGovernment RegulationMedicare Part B -- economicsUnited StatesUnited States. Department of Health and Human Services