Just to add my $0.02
Practicing surgeon here. I work for a large IPA in So Cal and fortunately for us we have whole department trying to make of whats going on with rapidly changing healthcare delivery system. At this point, I am convinced that fee for service business model of healthcare is on it's way out. As ACAs come into place in every states, lion share of current fee for service patients will be forced into some form of managed care further and further shrinking the pool of available patients for fee for service providers. I do think that KP is one of very few models that will be sustainable in the future, so listen to what Sandman99 is telling you; he speaks the truth. KP spots are going to become more and more competitive in the future.
Any MD on here who disagrees with me in this should spend some time on Sermo.com. You will be convinced then.