There are so many words to describe Dr Mary Koumas, but AMAZING would be the most appropriate. I have been seeing Dr Mary since 1988. She is caring, vastly knowledgable, spends as much time as you need and it takes to sort out solutions. She is one of the few physicians left in Orange County who actually still visits her patients who are hospitalized. I don't know how she does it, but she knows everything about each patient she sees and is not afraid to do whatever it takes to help identify and take steps to resolve your medical issues - even the most obscure. I can't say enough good things about her.