Uh, source?
Moore was trying to demonstrate that Cuba has health care, in a literal sense. I haven't seen the movie yet, but I presume the point Moore was trying to make is that his rescue workers would receive medical attention in Cuba regardless of their health insurance plan (or lack thereof) as opposted to the US where piles of red tape and corporate greed bars you from receiving required surgery (if you lack health insurance)
I doubt Moore would infer that the actual quality of Cuba's medical facilities rivals those of the United States.