I have an elderly gentleman that is saying that his co-pay is $50 and his doctor is putting a $1.00 tax on it. Is this legal?

There should be no tax on services. I would have him ask at office what the charge was for. Then if he is correct that they call it a tax he should call his ins company and talk with them.

Seattle, ask if the office charges for use of a credit card. We use them on noncovered charges and have never experienced the add on fees. Firms typically factor it into the price of noncovered items, where it's less noticeable.

FF is on the right track. If you use a debit card at the doctors office, your bank adds on its ATM fee.

It could be if the elderly gentleman is using a credit card to pay for the co-pay, the office is charging a $1.00 for the use of using a credit card.

Services aren't taxed. I agree with GA that the charge was probably for something else.

Unless I'm mistaken, I don't believe that lay people, or anyone other than a governmental entity, has taxing authority under the US and state constitutions.

I suspect the $1 is a processing charge, or late charge, or something like that. Perhaps your elderly friend was confused?

Still, it's not very friendly of his doctor to do this; unless this doctor is an outstanding practitioner, I'd be looking for one who doesn't pad the bill.