Frequently Asked Questions

Your healthcare provider can fill out and fax a requisition form to Castle Biosciences from our Order a Test page. For some of our tests, your healthcare provider’s office will receive a specimen kit for preparing and sending the tumor tissue sample to the lab for analysis. The lab will send a report with the test results within 5 days of receiving the tumor sample in our laboratory.

Molecular diagnostic testing is an emerging, fast-growing field, so it would not be unusual for your doctor to be unaware of all the tests that are now available to help guide treatment planning. If your doctor is interested in more information beyond our test descriptions on this website, please refer them to Castle Biosciences’ customer service (at 866-788-9007 or email).

Please call our customer service staff at 866-788-9007 or email.

DecisionDx-Melanoma provides you and your healthcare professional with personalized information to help inform decisions about your follow-up management and care plan. The test identifies the likelihood that your tumor could recur or spread within the next five years. For most patients eligible for a sentinel lymph node biopsy, the test can also provide information to help make decisions about this surgical procedure. This information should be helpful for you and your healthcare professional to decide on a treatment plan. Your care team will incorporate the DecisionDx-Melanoma results based on your individual situation, together with results from other tests and procedures.

Your healthcare professional (physician, physician assistant, or nurse practitioner) needs to order the test for you. The test can also be requested via an online portal.

The laboratory will send a report with the test results to your healthcare professional within approximately 5 days after receiving the tumor sample in our laboratory.