I'm going to Santiago, Chile in November for 13 days for an orthopaedic surgery exchange from the US. During that two weeks, my salary will come from the hospital in Chile. Do I need to obtain a work visa for that trip? I've seen posts stating a visa isn't required for "business trips" less than 90 days, but I wasn't sure if this includes work where you're being paid by a Chilean entity? Anyone know for sure? The work visa process is a pain for such a short trip and with the US government shutdown the FBI background check portion of the work visa may take a while.