The Food and Drug Administration (FDA) and the Centers for Medicare and Medicaid Services (CMS) recently released a joint statement suggesting that the FDA is about to end its decades-long policy of declining to regulate lab-developed tests (LDTs). The statement casts the policy as outdated and suggests that the FDA is about to impose regulation to treat LDTs with the same approach as all other laboratory tests.
Testing by clinical laboratories is regulated by both the FDA and by the Clinical Laboratory Improvement Amendments (CLIA), as administered by CMS. The FDA regulates medical devices, including in vitro diagnostic products (“IVDs”). The FDA considers LDTs to be IVDs that are intended for clinical use and are designed, manufactured, and used within a single laboratory. CLIA, on the other hand, regulates the laboratory itself and classifies LDTs as “high complexity tests,” with corresponding standards imposed on the laboratory. Importantly, regarding the LDT itself, CLIA generally requires only analytical validation, which can occur after testing has already begun. LDTs may also be subject to more stringent state and private sector oversight.
Historically, the FDA had exercised enforcement discretion and not regulated LTDs, but this began to change in recent decades and accelerated during the COVID-19 pandemic. The pandemic caused an explosion in the need for quick, accurate, and cost-effective means to detect the virus that causes COVID-19. Many clinical labs responded by developing LDTs to detect COVID-19. As LDTs, labs were quickly able to innovate and begin bringing tests for COVID-19 to market. FDA responded by muddying the waters and adding regulatory burden. Initially, the Department of Health and Human Services (HHS), then under the Trump administration, released guidance that, during the public health emergency (PHE), LDTs for COVID-19 would not require pre-market approval. FDA then, in seeming contradiction of HHS, determined that the at-home collection kit of a COVID-19 LDT was distinct from the test itself and subject to FDA regulation. Later in the pandemic, HHS, now under the Biden administration, changed policy again and allowed the FDA to regulate all COVID-19 LDTs.