Here in Bariloche I have OSPE plan 425 (ospesalud.com.ar) and my 'Aportes Obra Social' (from my monotributo) go towards the OSPE payment. With the recent recent restructuring of the monotributo categories, then the increase in 'aportes obra social' my OSPE payments just decreased from AR$134 month to just AR$93 a month!
I have a co-pago of about AR$10 per doctor visit, have had excellent attention in the private hospitals here in Bariloche, had CAT scans, MRI (AR$80 pesos co-pago), xrays etc....
I'm in my late 30's.