Médico and Doutor are used the same way related to the Healthy System. But if a person gets his Master degree /PhD in some area, he is also a Doutor, but not médico. Doutor has a wider usage, for anybody who is specialized in something, as a lawyer, biologist, etc. So, a médico is also a doutor, but a doutor isn't necessarily a médico.
I get really fed up with saying it perfectly OK, but the speech recognition taking so long that it decides I had it wrong - and there is no button to say 'let me say it again until the computer/tablet/phone picks it up'. No way of reporting this fault either. On my ipad it does give me time to do it again if only part of the sentence registers.