Customer Service: 866-788-9007
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Step 1

Order the Test

Download a comprehensive diagnostic testing solution order form or call Customer Service for personalized assistance at 866-788-9007 and select option #1.
 

Step 2

Specimen Preparation and Shipping

The diagnostic GEP testing solution uses the same tissue from the diagnostic biopsy or excision procedure, avoiding additional procedures. Castle coordinates all specimen collection and shipping directly with your pathology laboratory.

Step 3

Specimen Analysis and Test Report

The test report is typically delivered within 3-5 days from specimen receipt at our lab.

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