I receive a reimbursement for my Kaiser bill on my paycheck(50%) It is counted as non taxable income on my paycheck. At the end of the year this amount will be a line item on my W2 form. Will I have to put this amount on my taxes next year or can I leave it off? If I don't put it on my taxes next year it won't match my W2 form. Is this okay? What should I do?

What is a Kaiser bill?

Kaiser is our health care our company belongs to. We send in our bills to a third party insurance company and they reimburse our company and our company gives us half of what we paid for our doctor visit. The money is added to our paycheck. It is not taxed but it comes out as income. Is this right?