Can you explain further what you mean? I recently had an x-ray that was not covered by my insurance, and the hospital submitted it to my insurance to ensure that it would apply to my deductible.
I guess you mean a fee that is uncovered in the sense that it would not apply against the deductible.
(It's total BS, the price I paid was 5x the medicare reimbursement rate, like 15x the medicaid reimbursement rate and I would speculate at least 2x what the insurance company would pay (based on researching the 'typical cost' of the particular x-ray on the internets).)