FDA product code · Pathology
Immunohistochemistry Test, Dna Mismatch Repair (Mmr) Protein Assay
3 FDA decisions since 2021. No recall names this code.
The DNA Mismatch Repair Protein Antibody is a qualitative immunohistochemical antibody intended for the assessment of mismatch repair (MMR) proteins in human clinical tissue specimens. The DNA Mismatch Repair Protein Antibody is indicated as an aid in identifying patients eligible for treatment with specific FDA approved therapeutic drugs.
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly Download the data (CSV)
Twenty years of QNH at a glance: how often FDA decides these devices, how long 510(k) reviews take, how often they are recalled, and how many adverse event reports name the code.
FDA decisions per year · QNH
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · QNH
Too few QNH 510(k)s in any year since 2007 to give a median.
Recalls per year · QNH
No recall names QNH since 2007.
Adverse event reports per year · QNH
1in 2023
MAUDE reports naming product code QNH, 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 | 0 | — | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 0 |
| 2010 | 0 | — | 0 | 0 |
| 2011 | 0 | — | 0 | 0 |
| 2012 | 0 | — | 0 | 0 |
| 2013 | 0 | — | 0 | 0 |
| 2014 | 0 | — | 0 | 0 |
| 2015 | 0 | — | 0 | 0 |
| 2016 | 0 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 0 |
| 2018 | 0 | — | 0 | 0 |
| 2019 | 0 | — | 0 | 0 |
| 2020 | 0 | — | 0 | 0 |
| 2021 | 2 | — | 0 | 0 |
| 2022 | 10 | — | 0 | 0 |
| 2023 | 5 | — | 0 | 1 |
| 2024 | 4 | — | 0 | 0 |
| 2025 | 4 | — | 0 | 0 |
| 2026 | 5 | — | 0 | — |
Planning a device in QNH? A 510(k) Report ranks candidate predicates in this code by lineage, citations and recall history, with the review-time outlook.
See the 510(k) ReportRelated product codes
Other codes under 21 CFR 864.1860.