Biocept, Inc. is a molecular oncology diagnostics company. The Company develops and commercializes circulating tumor cell (CTC) and circulating tumor deoxyribonucleic acid (ctDNA), assays utilizing a standard blood sample, or liquid biopsy. The Company's Target-Selector offering is based on an internally developed, microfluidics-based CTC capture and analysis platform, with enabling features that change how CTC testing can be used by clinicians by providing biomarker detection and monitoring requiring only a standard blood sample. The ctDNA technology enables mutation detection and is applicable to nucleic acid from CTCs or other sample types, such as blood plasma. The Company commercializes its Target-Selector assays for a range of solid tumor indications, such as breast cancer, non-small cell lung cancer (NSCLC), small cell lung cancer (SCLC), gastric cancer, colorectal cancer, prostate cancer and melanoma.