Hello, I have used both systems here private and national health which I am now. I have been treated by a surgeon, oncologists, cardiologists, a neurologist, dermatologist, physiotherapist, radiotherapist and have seen the treatment given to friends that I haven’t had the need for. All of the doctors spoke English with the exception of one ( I do speak Spanish. ) I live on the Costa Blanca and there is a big ex pat community here. It is a very good health service and if you do access it the treatments are free and the prescriptions are cheap. Best wishes.