This completely depends on what country you live in and whether he is insured by a government program (Medicare in the US) or private/commercial insurance (such as Aetna, Cigna). Also, remember the amount paid to the hospital on a patient on Medicare or Commercial Insurance is a negotiated rate for that specific surgery. For example, they most likely have a rate of ~$30,000 which the hospital will be paid on a bypass surgery without complications. The kicker is if the patient does not have insurance and does not qualify for assistance the patient gets a bill from the hospital for each little item! In other words, they won't bill the patient the $30,000 but most likely this number would be inflated 3-4 times. If this is a real concern talk to someone in the hospital billing department...they can answer your questions. Please no my answer is based on the American system. Good luck!