Paul,
With the best prepagas, you will get a better health service than in the USA, believe me I went through both systems, Georgetown Hospital and Medicus here back home. It is not comparable, the queues, being taken care of most of the times when I got an appointment with the nurse, the M.D would only appear at the moment of delivering you a prescription, endless "'tramites", I could provide you 1000 more examples, my sister has had both her kids at Baptist Hospital, Miami and she is appalled by the service, lack of personal attention etc. Just think it in terms of numbers, around 80% of the american population belongs to a prepaga, in Argentina it scarcely reaches 15%, 20%, so you belong- let's put it bluntly- to an elite with elite services (same technology than the USA at best hospitals + personal attention from day one- no nurses). Not to disappoint whoever mentioned Italiano but you won't get the top notch technology over there, yes great great m.d.s. Most of the times you won't need that technology unless heart failures, strokes and so on.