Quest Diagnostics (NYSE: DGX) reported quarterly earnings of $3.12 per share which beat the analyst consensus estimate of $2.83 by 10.25 percent. This is a 19.08 percent increase over earnings of $2.62 per share from the same period last year. The company reported quarterly sales of $3.043 billion which beat the analyst consensus estimate of $2.973 billion by 2.34 percent. This is a 10.21 percent increase over sales of $2.761 billion the same period last year.