510(k) · Cleared
Recalled · Class II · 2018Tandem (R) M-Pak (TM) Total B-HCG Immunoenzy. Assay
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Hybritech, Inc. · JHI Visual, Pregnancy Hcg, Prescription Use
Cleared on Apr 8, 1987 after a 61-day review. FDA has not posted a summary or statement for it, so its predicates are not known. It has been recalled once.
- Decided
- Apr 8, 1987
- Review
- 61 days
- Class
- Class II
- Product code
- JHI
- Recalls
- 1
- 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 JHI? 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 JHI device
- #1 K262299 Instant-View® hCG Combo II Cassette Testscore 12.7 · 3 generations · no Class I recall
- #2 Held for the reportin the report
- #3 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)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Mar 5, 2018 | Class II | Z-2083-2018 | Device Design | Asfotase Alfa (Strensiq) interferes with certain Tosoh assays which potentially causes falsely increased or falsely decreased immunoassay test results, depending upon the assay. |
No ancestor or descendant has a Class I recall.
How does its category compare?
All JHI devicesJHI Visual, Pregnancy Hcg, Prescription Use: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · JHI
1in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · JHI
101in 2007
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · JHI
1in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · JHI
265in 2025
MAUDE reports naming product code JHI, 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 | 4 | 101 | 6 | 245 |
| 2008 | 0 | — | 8 | 29 |
| 2009 | 0 | — | 1 | 106 |
| 2010 | 1 | — | 2 | 143 |
| 2011 | 0 | — | 1 | 138 |
| 2012 | 2 | — | 0 | 219 |
| 2013 | 2 | — | 0 | 185 |
| 2014 | 2 | — | 0 | 112 |
| 2015 | 0 | — | 0 | 134 |
| 2016 | 1 | — | 0 | 143 |
| 2017 | 1 | — | 0 | 113 |
| 2018 | 1 | — | 0 | 132 |
| 2019 | 0 | — | 0 | 571 |
| 2020 | 0 | — | 0 | 114 |
| 2021 | 0 | — | 0 | 158 |
| 2022 | 1 | — | 0 | 126 |
| 2023 | 0 | — | 6 | 147 |
| 2024 | 1 | — | 1 | 256 |
| 2025 | 0 | — | 0 | 265 |
| 2026 | 1 | — | 4 | — |
https://510kreport.com/device/K870521 · printed Nov 6, 2026
Cite this page
510(k) Report. “K870521: Tandem (R) M-Pak (TM) Total B-HCG Immunoenzy. Assay.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K870521
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Record history
- FDA decision record loaded May 2, 2026
- Page last updated Nov 3, 2026