ALK-1 , (For heme cases)

Immunohistochemistry (IHC)

The ALK1 (ALK1 cline) antibody labels normal human ALK protein and the NPM-ALK chimeric protein, and is a useful tool for the identification of the subgroup of anaplastic large-cell lymphomas (ALCL) that are ALK positive.

Turnaround time

1 Day

Level of Service

Technical Only

New York Approved: Yes

Specimen Requirements

Cut Slides: H&E slide (required) plus 2-3 unstained slides cut at 4-5 microns for each IHC test ordered.
Note on FFPE: Paraffin block is preferred. Do not use zinc fixatives. If submitting slides, please use positively-charged slides and 10% NBF fixative. Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.

Storage and Transportation

Use cold pack for transport, making sure cold pack is not in direct contact with specimen. Slides can be packed at room temperature. NYS clients please provide date and time of Collection.

CPT Code(s)*

88342 x 1 or 88341 x 1

*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.

Last Updated: July 28, 2025

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Our Client Services team is on hand to help. Please call us at 866.776.5907, Option 3.