Can you please link to where you're getting your information? My understanding is that she very much IS a physician and yes, all physicians can diagnose physical illness. If she's a physician (pediatrician, I believe), then she is very much qualified to say that Maya was or wasn't suffering from CRPS. She may have been wrong, but that doesn't mean she's not qualified. Where are you seeing that she's not a physician?
FYI, Sally Smith is an MD, board certified in pediatrics and did a child abuse fellowship it seems. She got her MD from St. Louis University. It doesn't mean she's good at what she does, but she is a physician and is qualified do diagnose any type of physical illness, including CRPS.
Dr. Sally Smith, the former medical director for Pinellas County (Florida) Child Protective Services, came under fire for her child abuse diagnoses.
www.pnj.com