I too would like to know if that pic is legit and not photo shopped.
That photo was taken at a New York City protest, so the odds are that it is not her, since she lives on the West Coast.
The "pussy hat and stethoscope" photo that is also circulating is definitely not her.
Sometimes mistakes happen because people don't check out their web search results and circulate erroneous information.
Sometimes it's because people just don't care.