NovellusDx provides functional testing of cancer mutations to guide treatment decisions and avoid ineffective therapies. It analyzes mutations from next generation sequencing reports using a high-throughput clinical lab with proprietary technology. This identifies whether variants of unknown significance are driver mutations and which drugs they respond to or develop resistance against. A case study showed a BRAF variant was highly oncogenic but resistant to an ERBB2 inhibitor, and responded to a BRAF inhibitor instead, changing the optimal first-line treatment.