I'd love to hear organizations other nurses have used for medical missions.
Especially any that are currently helping the refugee situation and serve children.
There are refugee/ resettlement organizations in most major cities. I know here in Indiana, we have a large number of persecuted Chin Christians from Myanmar who have come here. You might look close to home first to plug into a network.
Of course, most churches have a number of short term missions opportunities. Mine goes to Ivory coast, Haiti, Mexico and Honduras annually.