This is what a physician in America has to say about the issue:
Pharma and the insurance industry are evil. Moreover in the case of the health insurance industry they serve no purpose. Previously insurers would assume risk and in doing so merit some financial reward. With the advent of capitation and risk selection, they don't even do that anymore. They are leeches, that in the words of Sicko: Flat Suck.
And I can also assure you that the denials of care that Moore described were not the exceptions, but the rule. I have a patient (whose details are a bit obscured in this story) who has a number of serious medical problems. He has a history of a bleeding ulcer and recently began to have symptoms that were the same as he'd had when he had the ulcer. So I prescribed a Proton Pump Inhibitor (the one that was the preferred drug on that insurer's formulary.) They denied it saying that he had reached the limit of the number of medicines he was allowed to have. In order to have the ulcer medicine he would have to go off of one of his diabetes, blood pressure, or asthma medicines or pay for one of them out of pocket.
And sorry, but the cries of 'socialized medicine' being worse than what we have are for shit. If everyone has the same insurance, then every doctor and hospital would take it. I transfer patients every day from the ER to other hospitals when mine is perfectly able to provide them treatment and the patients want to stay at my facility. But their insurer says they won't pay for them to stay to have their appendix removed at the community hospital in their town, but demands they be transfered to a facility 40 miles away that is 'in network.' Of course they can choose to stay if they want (and we would treat them as required by the EMTALA law.) However their insurer gives them the ultimatum: be sent to another hospital they don't want or be faced with the $30,000 bill for their surgery and recovery in the hospital they do want. So the claims of not being able to 'choose your doctor or hospital' are not what you'd have in a single payer system, but are what you get every day if you are insured under an HMO, PPO, or other device used by the insurance industry to deny you care.
And that is what its like for those with insurance. For those without it can mean death or permanent disability. I see people in the ER every day who have delayed or avoided care because of uninsurance who experience severe consequences because of it. Perforated appendicitis because of a delay due to worries about costs. A child admitted to the hospital with a kidney infection that could have been easily treated with oral antibiotics days before but wasn't because of lack of access. Renal failure in a person with diabetes left untreated. People with bent forearms because while they were appropriately treated and splinted in the ER, they were unable to see an orthopedist for subsequent definitive treatment because of lack of insurance. That is stuff you expect to see in the developing countries, not the richest country in the world. Of course it is easy to see the villain in that scenario as the evil orthopedist who would not see him for free. (And I will admit ortho is one of the worst offenders for unwillingness to provide uncompensated care.) However why should one group of professionals (health care providers) be expected to shoulder the cost of health care for 15-20% of the US population simply because the country refuses to? I don't mind paying taxes to support health care for all in the US, but I do take issue with the tax being exclusively applied to doctors and nurses and PTs and RTs etc, while an attorney or programmer or businessman who makes as much or more than I do pays nothing.
The saddest part is that we already spend in GNP well more than enough to cover every man, woman, and child in the US with a health care system that the world would envy. We pay about 15% of our GNP for health care, while most developed nations spend around 7-8%. If we took all of the money that goes to 'profits and administration' (about 30%) in the for profit health insurance industry, as well as negotiating for drug prices that were on par with what the rest of the developed world we would have enough to pay for everyone.
So I think Moore is right: Its sicko.