FDA Downgrades SMA Newborn Test to Class II
Published Date: 6/11/2026
Rule
Summary
The FDA is officially putting the Spinal Muscular Atrophy (SMA) newborn screening test into class II, meaning it has special safety rules but fewer hurdles than the strictest category. This change helps make the test safer and easier to get to babies who need it, starting June 11, 2026, with the classification effective since November 2022. Labs and device makers will benefit from clearer rules and faster access, helping catch SMA early without extra costs or delays.
Analyzed Economic Effects
5 provisions identified: 3 benefits, 2 costs, 0 mixed.
SMA Newborn Test Reclassified to Class II
The FDA classified the Spinal Muscular Atrophy (SMA) newborn screening test system as Class II (special controls), with the order effective June 11, 2026 and applicable since November 9, 2022. The agency says this classification provides reasonable assurance of safety and will enhance patients' access to the test.
Detailed Special-Control Study and Labeling Rules
To qualify under Class II, device makers must meet specified special controls, including extensive design verification and validation (detailed device description, analytical and clinical studies with summaries and 95% confidence intervals), multi-site reproducibility, lot-to-lot filter paper studies, reagent and shipping stability studies, software descriptions, and specific labeling statements (including that the test is prescription-only and presumptive positives require confirmatory diagnostic testing).
Lower Regulatory Hurdles for Test Makers
FDA says placing the SMA newborn screening test into Class II via the De Novo process reduces regulatory burdens and allows the device to serve as a predicate for future devices, which can speed market access for similar tests.
510(k) Premarket Submission Still Required
The order states that Spinal Muscular Atrophy newborn screening test systems are subject to premarket notification under section 510(k) of the FD&C Act at this time because FDA has not determined they should be exempt under section 510(m).
Prescription Screening; Positives Need Confirmation
The SMA newborn screening test system is identified as a prescription in vitro diagnostic intended to detect SMN1 gene deletions from dried blood spot specimens, and presumptive positive results are intended to be followed up by diagnostic confirmatory testing.
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