# Immunohistochemistry Assay, Antibody, Claudin 18
> **Product code: QZJ** · Class III — High Risk (PMA approval required, life-sustaining) · Hematology · 21 CFR 864.1860
## Classification
- **FDA Product Code:** QZJ
- **Device class:** Class III — High Risk (PMA approval required, life-sustaining)
- **Regulation:** 21 CFR 864.1860
- **Review panel:** PA
- **Medical specialty:** Hematology
- **Submission type:** 2
- **GMP exempt:** N
- **Life sustaining:** N
- **Implant:** N
- **Third-party review:** N
## Definition

The Claudin 18 antibody is a qualitative immunohistochemical antibody intended to identify CLDN18 protein expression in human clinical tissue specimens. The CLDN18 antibody is indicated as an aid in identifying patients eligible for treatment with specific FDA approved therapeutic drugs.

## Market data
- **Cleared 510(k) submissions:** 0
- **Registered establishments:** 1
## Source
- [FDA Device Classification](https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpcd/classification.cfm?ID=QZJ)
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