The estimated total pay for a Client Service Representative at Quest Diagnostics is $21 per hour. This number represents the median, which is the midpoint of the ranges from our proprietary Total Pay Estimate model and based on salaries collected from our users. The estimated base pay is $19 per hour. The estimated additional pay is $2 per hour. Additional pay could include bonus, stock, commission, profit sharing or tips. The "Most Likely Range" represents values that exist within the 25th and 75th percentile of all pay data available for this role.