Health Law Advisor

As the song goes, the Food and Drug Administration’s (“FDA’s”) 2024 Final Rule regulating laboratory-developed tests (“LDTs”) as medical devices (“Final Rule”), is not merely dead—it’s really most sincerely dead.

Perhaps not for good, but for the foreseeable future, at least.

The FDA has let the clock run out on the 60-day time period to appeal the March 31, 2025, decision by the U.S. District Court for the Eastern District of Texas concluding that: 1) the FDA overstepped its authority, and 2) the LDT Final Rule of May 6, 2024, was unlawful. As we explained at that time, the Final Rule would have required virtually all clinical laboratories offering their own LDTs to comply with FDA expectations for medical device manufacturers in phases over a four-year period—with the first compliance deadlines set for May 2025.

The March 2025 opinion by Judge Sean D. Jordan vacated the controversial Final Rule a little more than a month before the first implementation deadlines were to take effect, and remanded the issue back to the FDA.

From our Thought Leaders in Health Law video series: On March 31, 2025, the U.S. District Court for the Eastern District of Texas ruled that the Food and Drug Administration (FDA) lacks the statutory authority to regulate laboratory-developed tests (LDTs).

The court’s judgment vacates the agency’s controversial final rule of May 6, 2024 (the “Final Rule”), regulating LDTs as medical devices, just weeks before the Final Rule’s initial implementation deadline and remands the issue back to the FDA for further consideration.

The order is in, and the LDT Final Rule is out.

In May 2024, the U.S. Food & Drug Administration (“FDA” or the “Agency”) published its Final Rule establishing its regulatory framework over laboratory developed tests (“LDTs”) as medical devices and, in effect, announced the end to decades of enforcement discretion by the Agency. The deadline to comply with the first phase of the Final Rule was set for May 6, 2025. On Monday, March 31, however, a federal judge in the U.S. Eastern District of Texas ordered that “FDA’s final rule exceeds its authority and is unlawful” and that “[t]herefore, consistent with controlling circuit precedent, the proper remedy is vacatur of the final rule and remand to FDA for further consideration in light of this opinion.”

Epstein Becker & Green’s Life Sciences Team is continuing to review and digest this order and its impact on the clinical lab industry, and we plan to release a more fulsome analysis in the coming days.

New from the Diagnosing Health Care Podcast: Laboratories in the United States are facing a major regulatory landscape shift.

The U.S. Food and Drug Administration (FDA) has finalized a new rule ending its historical blanket enforcement discretion over laboratory developed tests (LDTs). What does this mean for labs going forward?

On this episode, Epstein Becker Green attorneys James Boiani, Rob Wanerman, and Megan Robertson lay out the new landscape, analyze existing and potential challenges, and identify key developments to watch for as this new regulatory era unfolds.

Today, on April 29, 2024, following more than a decade of discourse, the U.S. Food and Drug Administration (“FDA” or the “Agency”) released its long-awaited “Medical Devices; Laboratory Developed Tests” Final Rule (the “Final Rule”) formalizing the Agency’s authority to regulate laboratory developed tests (“LDTs”) as medical devices.

Since FDA issued its Proposed Rule (the “Proposed Rule”) in the Fall of 2023, Epstein Becker Green (EBG) and other industry stakeholders have eagerly awaited FDA’s issuance of the Final Rule and have speculated as to the provisions the Agency would choose to finalize.

Now, with the wait finally over, EBG joins the rest of industry in our review of the Final Rule, and we will be preparing a more in-depth analysis of the Final Rule and its potential impact on laboratories and the nationwide healthcare system. For now, here are important preliminary takeaways from the Final Rule.

On October 31, 2023, FDA hosted a webinar to address some of the frequently asked questions the agency has received since the September 29, 2023 release of its proposed rule on laboratory developed tests (“LDTs”). The materials from the webinar are available on FDA’s CDRH Learn webpage. Importantly, FDA announced during the webinar that the agency does not currently plan to extend the comment period for the proposed rule beyond the standard 60-day timeframe, and therefore, comments are still due on Monday December 4, 2023. In both the preamble to the proposed rule and stated ...

In a last minute push before an anticipated government shutdown, FDA put down its marker for moving forward toward regulation of lab developed tests (“LDTs”). Unlike past proposals from FDA and Capitol Hill, FDA has taken a simple approach: laboratories that make LDTs for clinical use are manufacturing in vitro diagnostic medical devices (“IVDs”) for commercial distribution, and as such must eventually comply with FDA’s already-established IVD requirements. The FDA zeitgeist boils down to this: It doesn’t matter if the lab is large or small, for profit or ...

As discussed in our June Insight, earlier this year FDA publicly announced its development of a proposed rule that would expressly define laboratory developed tests (“LDTs”) as medical devices and subject them to the agency’s regulatory authority. Such a rule would be FDA’s first comprehensive attempt to impose its authority over LDTs since its 2014 draft guidance, which FDA ultimately chose not to finalize, and comes after several failed congressional legislative attempts to do the same.

Since the passage of the Medical Device Amendments of 1976, FDA has regulated in vitro diagnostic (IVD) tests as medical devices, subject to a full suite of FDA requirements.  During that time, FDA has also asserted that it has the authority to regulate in-house tests developed and performed by CLIA-certified, high-complexity clinical laboratories (generally referred to as laboratory-developed tests or LDTs) but chose as a matter of enforcement discretion not to regulate LDTs.  Over time, the Agency chipped away slowly at LDT enforcement discretion, carving out certain kinds of tests (e.g., direct-to-consumer LDTs) and thus making them subject to regulation, but by and large did not take broad steps to regulate LDTs.

At the January 8-9, 2015 FDA public meeting on the agency's proposal to regulate a portion of lab developed tests (LDTs), there was much debate regarding whether FDA has jurisdiction over IVDs made at clinical laboratories. Not coincidentally, on January 7, the day before the meeting, the American Clinical Laboratory Association released a white paper developed for the Association by a couple of prominent constitutional law scholars.  The paper outlined the arguments at a high level against FDA jurisdiction over lab developed tests generally. But with all due respect to the authors as well as the speakers at the FDA public meeting, the discussion to date is taking place at such a high level that I do not find it particularly helpful. Mostly the discussions merely stake out the positions held by interested parties. They don't advance the collective understanding of the issues.

In connection with the public meeting, I developed five questions which help me think through the legal issues. I'd like to share those questions, in an effort to drive the discussion to a more granular level where differences can be more effectively debated and resolved. In addition, as with any lawyer, I'm drawn to precedent, so I'd like to share how FDA has tackled similar issues before. At the end of this post, based on precedent but also my conclusion that both sides are overstating their legal positions, I offer a path forward down the middle-of-the-road.

5 Questions That Frame FDA Authority Over IVDs Made at Labs

In posing these questions, I start with the most basic and simple and then move closer and closer to the current facts. In each case, I'll also give you what I think the answer is.