Companion Diagnostics Market Size, Share, By Offerings (Products and Services), Technology (Polymerase Chain Reaction (PCR), Next-generation Sequencing (NGS), Immunohistochemistry (IHC), Fluorescence In Situ Hybridization (FISH), and, Others), Therapeutic Area (Oncology, Immunology, Neurology, Autoimmune, Cardiovascular, Infectious Disease, and Others), End-User (Pharmaceutical & Biotechnological Companies, Contract Research Laboratories, Diagnostics Laboratories, and Others), and Region - Trends, Analysis, and Forecast till 2035

Companion diagnostics market size was valued at USD 8.5 Billion in 2025 and is expected to reach USD 25.8 Billion by 2035, growing at a CAGR of 12.9%

A companion diagnostic is a medical device, known as an in vitro diagnostic, which provides information that is essential for the safe and effective use of corresponding drug and biological product. The increasing prevalence of cancer, growing focus on precision medicine, discovery of new biomarkers, and co-development of drugs and corresponding diagnostics help to drive companion diagnostic market growth.