"Bogus overbilling" is rampant in hospitals.

Is your bill itemized (and I mean REALLY itemized) in English, or it is in codes? If in codes, go to your hospital and either get a list of the codes they use, or insist they go over ever single entry with you personally. Don't trust to memory -- write down every translation as you go.

You will probably find that you were charged for things they they didn't do and didn't give you. The husband of a friend of my sister's went into the ER for a suspected heart attack. When his wife insisted on details of the bill, among other things, they found they were being charged for a baby bassinet and a baby over-crib mobile. They also charged something like $12 for a single aspirin which they didn't give when they found his wife had given him one immediately when the problem started, and quite a few other things.

None of this is accidental.