Biocept, Inc. is an oncology laboratory service company, which engages in the development and marketing of novel laboratory products in the detection of rare cells to include circulating tumor cells. The company is headquartered in San Diego, California and currently employs 50 full-time employees. The company went IPO on 2014-02-05. The firm focuses on developing and commercializing clinical diagnostic laboratory assays designed to identify rare tumor cells and cell-free tumor deoxyribonucleic acid (DNA) from blood and cerebrospinal fluid (CSF). Its product is branded and trademarked under the name CNSide. CNSide encompasses a suite of cellular and molecular technologies intended to aid medical professionals in CSF analysis and central nervous system (CNS) disease management in patients with solid tumors. The company offers and conducts its commercialized diagnostic assays, which include cell capture and enumeration, immunocytochemistry, fluorescent in situ hybridization (FISH), and next generation sequencing (NGS). The company has commercialized its CNSide assays for detecting and characterizing many different carcinomas and melanoma. These assays utilize its dual cellular and ctDNA technology platforms and provide biomarker analysis from a patient’s CSF sample.