SECAUCUS, N.J., Aug. 5, 2025 /PRNewswire/ -- Quest Diagnostics (NYSE: DGX), a leading provider of diagnostic information services, today announced the completion of its previously announced acquisition of select clinical testing assets of Fresenius Medical Care's wholly owned Spectra Laboratories, a leading provider of renal-specific laboratory testing services in the United States. With this acquisition, Quest will be positioned to provide dialysis-related clinical testing to independent dialysis clinics p ...