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Incorporated in 1981 as Northwest Toxicology Consultants, the company initially operated as a clinical toxicology reference laboratory. The name was amended to Northwest Toxicology, Inc. (NWT) in 1985 when the laboratory entered the workplace drug testing market. In 1992, NWT entered the contract research organization (CRO) market and began offering advanced mass spectrometry GLP-compliant bioanalytical services to the pharmaceutical industry. This successful diversification led to the formation of Northwest Bioanalytical (NWB) as an operating division of NWT in 1995. The parent company was renamed NWT Inc. in 1996, following its successful expansion in the CRO market.
In 1998, NWT accelerated its growth in the CRO market through the acquisition of Pharmaknowledge, Inc., a bioanalytical consulting firm located in Princeton, NJ, resulting in the creation of Northwest Analytical Consulting Laboratories (NACL). NACL significantly increased its bioanalytical capabilities in 2001 through a relocation and facility expansion in West Trenton, NJ.
In 2002, NWB and NACL were renamed Tandem Labs. For over 20 years, Tandem Labs’ dedicated and experienced staff has supported over 120 pharmaceutical, biopharmaceutical, and biotechnical clients in the United States and internationally, securing Tandem Labs’ position as a recognized leader in the global bioanalytical services market.
In the first quarter of 2004, NWT sold its drug-of-abuse testing business unit, Northwest Toxicology, to LabOne, Inc. This strategic divestiture allowed management to concentrate its undivided attention on the future of Tandem Labs.
In February 2008, Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) acquired all of the outstanding shares of Tandem Labs and its parent company NWT Inc. Tandem Labs continues to operate under its existing name with its current employee and management structure, as a member of the clinical trials group at LabCorp.
In June 2010, LabCorp® acquired the Bioanalytical Division of Enthalpy Analytical, Inc. The acquired bioanalytical division of Enthalpy Analytical became the North Carolina laboratory site for Tandem Labs and now operates under the Tandem Labs' name.