DecisionDx-Melanoma is a validated 31-gene expression profile (GEP) test that was developed to identify the risk of recurrence or metastasis including the likelihood of sentinel lymph node positivity for patients with stage I, II, or III melanoma and inform patient management decisions. The DecisionDx-Melanoma test accurately and independently predicts the risk of recurrence and metastasis, classifying patients as Class 1A (lowest risk), 1B/2A (increased risk), or 2B (highest risk).