FOLR1 IHC

Immunohistochemistry (IHC)

The VENTANA FOLR1 (FOLR1-2.1) RxDx Assay is an FDA-approved qualitative immunohistochemical assay using a mouse monoclonal anti-FOLR1 antibody intended for use in the assessment of Folate Receptor alpha (FRα) protein in formalin-fixed, paraffin-embedded (FFPE) ovarian cancer tissue on a VENTANA BenchMark ULTRA instrument.

FOLR1 is indicated as an aid in identifying patients with ovarian cancer (including epithelial ovarian cancer, primary peritoneal cancer or primary fallopian tube cancer) who may be eligible for targeted therapy treatment.

Specimen Requirements

A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type or one (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4-5 microns) for each test/antibody ordered. Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition. For evaluation, tissue submitted must have 100 viable tumor cells present.

Storage and Transportation

Use cold pack for transport, making sure cold pack is not in direct contact with specimen. NYS clients please provide date and time of Collection.

CPT Code(s)*

88360x1

Turnaround time

1-2 Days

Global: 2 Days
Tech-Only (stain only): 24 Hours

Level of Service

Global
Tech Only

Integrations

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New York Approved: Yes

*The CPT codes provided with our test descriptions are based on AMA guidelines and are for informational purposes only. Correct CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.

Biomarkers

Immunohistochemistry (IHC)

Expression
FOLR1

Last Updated: January 28, 2026

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