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BioWorld - Thursday, January 8, 2026
Home » lab-developed tests

Articles Tagged with ''lab-developed tests''

U.S. Capitol building

US FDA rolls out companion diagnostic pilot to overcome LDT problem

Jan. 2, 2024
By Mark McCarty
The U.S. FDA has commenced with a pilot program for companion diagnostics (CDx) for oncology therapies, which fulfills in part a 2014 agency guidance on the use of CDx. The FDA expects to enroll only nine reference drugs and the associated companion test, but the pilot program is part of the FDA’s controversial attempt to deal with lab-developed tests (LDTs), specifically those tests that are used to determine whether a patient is likely to respond to a particular oncology treatment.
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U.S. Capitol building
‘23 in review

US FDA, Congress, fail to resolve lab-developed test mess

Dec. 27, 2023
By Mark McCarty

As calendar year 2023 limps to the finish line, a number of important regulatory developments emerged and then submerged, but one development that is also a non-development took center stage in the world of med tech. The U.S. FDA has proposed a regulation for lab-developed tests (LDTs), an issue that has been simmering for the better part of a decade thanks in no small part to Congress’ failure to pass legislation that would eliminate the FDA’s controversial approach to rulemaking.


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2023 FDLI Enforcement Conference

FDA facing a ‘somewhat unimaginable’ volume of applications for LDTs

Dec. 8, 2023
By Mark McCarty
The U.S. FDA’s draft rule for lab-developed tests (LDTs) has proven to be every bit as controversial as expected, although the controversy is only marginally about the workload that would come with rulemaking.
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Laptop displaying FDA logo

ACLA urges FDA to withdraw draft rule for lab-developed tests

Dec. 5, 2023
By Mark McCarty
The U.S. FDA’s draft rule for regulation of lab-developed tests (LDTs) was accorded a mere 60 days for comment, but nonetheless drew support from a number of stakeholders, including Foundation Medicine of Cambridge, Mass.
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Laptop displaying FDA logo

FDA not interested in extending comment period for LDT draft rule

Oct. 31, 2023
By Mark McCarty
The U.S. FDA’s draft rulemaking for regulation of lab-developed tests (LDTs) came with a conspicuously short comment period of 60 days, but the agency is unresponsive to requests to add another 30 days to the comment period.
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2023 Med Tech Conference

Advamed’s Whitaker more bullish on VALID Act in light of FDA draft rule for LDTs

Oct. 10, 2023
By Mark McCarty

The U.S. FDA’s draft rule for regulation of lab-developed tests (LDTs) was a long time in coming, much longer than any legislative proposals to overhaul the agency’s regulatory mechanisms for these tests. Nonetheless, Scott Whitaker, president and CEO of the Advanced Medical Technology Association (Advamed), believes that the FDA draft rule is likely to prompt Congress to pass the Verifying Accurate, Leading-edge IVCT development (VALID) Act, a development that would truncate an FDA final rule that would almost certainly face litigation.


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2023 Med Tech Conference

Congress seen as having leeway to bring LDT user fees on board midstream in MDUFA VI

Oct. 9, 2023
By Mark McCarty

The U.S. FDA’s draft rule for regulation of lab-developed tests (LDTs) carries an exceptionally ambitious timeline of completion and enactment by the time the next user fee agreement kicks in, and some see big problems with the timeline laid out by the agency. However, the FDA’s Elizabeth Hillebrenner said that Congress can tweak user fee legislation such that a specific set of user fee sources kicks in off schedule, thus giving the agency a little more leeway in completing any activity related to the proposed rule.


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FDA’s draft rule on lab-developed tests not necessarily the last word

Oct. 2, 2023
By Mark McCarty
The U.S. FDA has finally let fly with a draft rule for regulation of lab-developed tests (LDTs), an 83-page document that delves into the legal controversies regarding whether the agency has the requisite statutory authority. However, Allyson Mullen, a director in the D.C. office of Hyman, Phelps & McNamara P.C., told BioWorld that the emergence of this draft rule doesn’t mean Congress won’t eventually be dragged back into the LDT fray, particularly if stakeholders litigate to overturn the draft.
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Stenzel says FDA sees pressing need for automated reporting of at-home tests

Sep. 12, 2023
By Mark McCarty

The U.S. FDA is keen on developing policies to guide testing regimes for future pandemics based on the experience with COVID-19, and the FDA’s Tim Stenzel said on a Sept. 8 advisory hearing that automated reporting of at-home tests would clarify questions such as the spread of the pathogen and how well the tests are performing. Stenzel, who is the director of the Office of In Vitro Diagnostics and Radiological Health at the FDA, said the U.S. government agencies have made a number of grants for development of automated reporting mechanisms for at-home tests, signaling an interest on the FDA’s part that automated reporting capabilities will be a priority when the next pandemic strikes.


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Blue test tubes and dropper

FDA unveils pilot for oncology lab-developed tests as rulemaking nears

June 23, 2023
By Mark McCarty
The U.S. FDA reported a pilot program for validation of lab-developed tests (LDTs) used as companion diagnostics, a move that seems an implicit recognition that test kits as CDx products are not the darlings of test developers. The program arrives as the agency is considering rulemaking for regulation of LDTs, however, a combination of developments that promises to roil the already strained relationship between the FDA and clinical labs.
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