I am looking for an attorney to sue a health insurance company on a contingency basis?

My health insurance company haa falsely deemed a procedure that I've had 2 years ago a pre-existing conidtion. My medical provider is now suing me and they won't pay. I am unemployed and cannot afford an attorney on an hourly basis. Is there is anyone out there who will take my case on a contigency basis?
--------------------
OK, let me just tell you right off the bat - if you can't find an attorney to take your case on a contingency basis, it's because either you have a VERY weak case, OR, your case isn't worth enough money for his 40% to make it worth his while. And a few other things . . .regardless of insurance, you are ALWAYS responsible to your medical provider, for services you contracted, whether the insurance pays or not. Your provider is going to win this lawsuit. They'll garnish your wages, if you ever get a job again, and attach your assets, until the debt plus court costs plus interest is paid off, or until you file bankruptcy. Without having any details on the condition or the preexistance, I'd just like to point out, that many people are under the mistaken impression that "preEXISTING" and "preDIAGNOSED" are the same thing. They aren't. If your condition existed - whether or not it was diagnosed officially - before you purchased the insurance, it IS preexisting. The way to AVOID preexisting condition problems, is to NOT go without health insurance. If you have had health insurance for 10 years before buying this policy, it wouldn't have been a problem. But, many, many people WAIT until AFTER they have symptoms to buy the insurance, and lie about not having symptoms, and try to pretend that it's not preexisting. Then, when they get caught (because the doctor says the condition took at least six months to develop, or whatever), and the insurance company denies the claim, they get all bent.
Source