By who, to who, and for what?No, this is what is usually said.
Did you ask whether he is helping(does backing mean helping here)? If so ofcourse he is.Is the doctor backing a claim by making a diagnosis of illness or injury? If so, I'd ask whether there has been a second medical opinion.
Did you askAre you asking whether he is helping space here (does "backing" mean "helping" here)? If so, of space here course he is.
At my office. If there are two claims by two different doctors then insurance usually pays only one."Backing" here means "supporting". If someone makes a claim, particularly for a medical cost, the insurance might require a doctor to "back" (or "back up") that claim in some way. I'm not entirely convinced that that's what the original sentence (even a grammatical version) would mean. I would take it to mean "Have you seen any evidence of another claim (from the same patient) from a different doctor"?
Can you explain the situation in which you want to use the sentence you attempted in post #1?
Please answer my question.If they're trying to defraud the system by putting in two claims for one thing, I'm surprised the insurance companies even pay out for one of them. Both claims should be denied and their insurance policies should be cancelled. That's usually the result of fraud.