CQS

CQS, officially Consulting Químico Sanitario and commonly branded as CQS Salud, is a Spain-based private clinical reference laboratory and health diagnostics company. The company provides advanced clinical analysis services across clinical biochemistry, hematology and coagulation, immunology and allergies, microbiology and parasitology, and genetics. It is positioned as the first private clinical laboratory accredited in Spain by ENAC and the first and only private laboratory designated by the European Union as a reference laboratory for verification of certain Class D in vitro diagnostic medical devices. Beyond routine and specialized testing, CQS also operates in quality systems, biobanking, and regulatory-grade IVD verification services. The business is service-led rather than drug-development focused, with a commercial-stage diagnostics and laboratory operations model.