Quest Diagnostics (NYSE:DGX) reported quarterly earnings of $2.50 per share which beat the analyst consensus estimate of $2.35 by 6.38 percent. This is a 13.12 percent increase over earnings of $2.21 per share from the same period last year. The company reported quarterly sales of $2.895 billion which beat the analyst consensus estimate of $2.827 billion by 2.42 percent. This is a 9.16 percent increase over sales of $2.652 billion the same period last year.