how to make a benefit amount invisible on the paycheck

I have a client that has a benefit for health insurance that is fully paid for by the employer.   Since there is no deduction for the employee, the employees are questioning whether they have the insurance.   I suggested they create the benefit with the amount the employer it paying but they don't want the employee to see how much they are paying  (They understand it will need to be on the W2)  so what they want is the code to show (either Deduction or Benefit) with a zero amount.   

Any suggestions on how to do this??