Theradiag SA is engaged in the distribution, development and manufacturing of in vitro diagnostic tests. It operates through the following segments: Theranostics and Diagnostics. The Theranostics segment offers solutions for patients treated with anti-tumour necrosis factor alpha. The Diagnostics segment includes products for anti-immunity, genetics, allergy, infectious disease, drug of abuse, other diagnoses, and instrumentation. The company was founded on December 29, 1986 and is headquartered in Croissy-Beaubourg, France.