OptumCare is part of United Health Care. From their web site, it's not clear that the buy-up practices. They talk about doctors/practices partnering with OptumCare. It looks like OptumCare focuses on senior health care. And again, it's hard to tell from the web site, because it's a partnership it looks like they don't change much at the practice that partners with them. Some are large practices that do everything from babies to seniors, some are individual docs and everything in between. Some take all kinds of insurance and some are Advantage Plan only.
Senior Care & Medicare Clinics - OptumCare
Guess we will have to see what happens if it happens.