510(k) · Cleared
ClearedMicrozyme (TM) Free T4 Enzyme Immunoassay Test
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Immunotech Corp. · CEC Radioimmunoassay, Free Thyroxine
Cleared on Jun 24, 1991 after a 74-day review. FDA has not posted a summary or statement for it, so its predicates are not known.
- Decided
- Jun 24, 1991
- Review
- 74 days
- Class
- Class II
- Product code
- CEC
- Recalls
- None
- Predicates
- 0
FDA has not posted a summary or statement for it, so its predicates are not known.
Sources: FDA 510(k) database (decision fields), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in CEC? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new CEC device
- #1 K240273 Access Free T4score 7.0 · 1 generation · no Class I recall
- #2 Held for the reportin the report
What was it cleared against?
FDA has not posted a summary or statement for it, so its predicates are not known.
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
How does its category compare?
All CEC devicesCEC Radioimmunoassay, Free Thyroxine: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · CEC
1in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · CEC
238in 2014
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · CEC
1in 2018
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · CEC
213in 2025
MAUDE reports naming product code CEC, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 1 | — | 0 | 0 |
| 2008 | 2 | — | 0 | 0 |
| 2009 | 1 | — | 0 | 2 |
| 2010 | 0 | — | 3 | 7 |
| 2011 | 0 | — | 0 | 15 |
| 2012 | 1 | — | 0 | 6 |
| 2013 | 2 | — | 1 | 6 |
| 2014 | 3 | 238 | 0 | 40 |
| 2015 | 1 | — | 0 | 166 |
| 2016 | 1 | — | 0 | 148 |
| 2017 | 1 | — | 0 | 196 |
| 2018 | 2 | — | 1 | 199 |
| 2019 | 0 | — | 0 | 167 |
| 2020 | 0 | — | 0 | 106 |
| 2021 | 0 | — | 0 | 96 |
| 2022 | 0 | — | 0 | 81 |
| 2023 | 1 | — | 0 | 99 |
| 2024 | 1 | — | 0 | 276 |
| 2025 | 0 | — | 0 | 213 |
| 2026 | 0 | — | 0 | — |
https://510kreport.com/device/K911634 · printed Nov 4, 2026
Cite this page
510(k) Report. “K911634: Microzyme (TM) Free T4 Enzyme Immunoassay Test.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K911634
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Record history
- FDA decision record loaded May 2, 2026
- Page last updated Nov 3, 2026