I got a letter that said the exact same thing when I was hospitalized back in December. The bill was $6,000?? I was in the hospital for seven days, had a minor operation to fix a skin thing, and still didn't have to pay that much. The total bill that was sent to the insurance company was $21,000, but the insurance company's "network discounted rate" knocked that down to $4,000, of which I had to pay around $1,200. If they can afford to provide a discounted rate of $4,000 why are they billing $21K in the first place? I'd hate to imagine if I had NO insurance and had to pay cash. Would they discount it then? Probably not.