Castle Biosciences, Inc. Email Format
Biotechnology ResearchTexas, United States501-1000 Employees
Castle Biosciences, Inc. is a biotechnology research company that specializes in diagnostic tests intended to guide patient care. It is based in Friendswood, Texas, with laboratory operations in Phoenix, Arizona and Pittsburgh, Pennsylvania, and it serves clinicians and patients seeking data to inform cancer treatment decisions. The company’s portfolio includes tests for dermatologic cancers, Barrett’s esophagus, and uveal melanoma, each designed to address specific clinical questions along the care continuum. These tests leverage tumor biology to provide objective risk assessments, such as the likelihood of metastasis, recurrence, or progression, to support treatment planning. Recent developments include the opening of a new corporate headquarters in Friendswood, signaling an expanded footprint for its diagnostic operations.