<prompt> Human: So I had a colonoscopy on 031016 and got billed a little over 1400. Anesthesia was about 800. Last month I received a bill from the hospital for the amount of over 4000. The hospital denies changing the amount, however I have the statements to prove it. Why would the bill drastically change like this, and is there any way for me to fight it?Assistant: Its common to get a bill from the hospital services separately from Doctor services. One bill could have been the gastroenterologist and the other from the anaesthesiologist. Or from the recovery room and nurses.Human: I got the separate bill for anesthesiology for 800ish, but only the one other for 1400. Since March Ive only received the one other bill, until this last month I was floored when the total amount was over 4000. I even got a call from the hospital and spoke with a billing gal and she said that it was 4000. This whole thing has been nothing but a headache from the beginning. I originally was told by my doctorsurgeon that he negotiated with my insurance and got the procedure covered the hospital wasnt a preferred provider. I trusted that my doctor had pulled the proper strings and my colonoscopy would be covered, especially as it was an emergency I was bleeding internally. Then I got the bill. I fought with the hospital over that and they said that there was nothing they could do, and that I must have misunderstood my doctor. I was resigned so I applied for assistance, and was denied that. Finally I set up monthly payments and was just going to make it work, but now this. Ugh.  <response>: I am an analyst for a company that handles insurance appeals. Seems like your doctor messed up in the billing if he didnt billed for emergency. Going through ER and having procedure done because you might die is 100 covered even if Doctor, hospital, and anesthiologist is not within network. But you SOL if it isnt situation described. In your evidence of coverage for most PPOs... You are responsible for finding if things are covered and seeking pre approvals for procedures.Its not doctor or hospital responsibility to see if you covered. 