Just adding context that when it comes critical medical care involving specialized care, the United States almost has no equal - not even close. Whether that is Level 1 trauma facilities, oncology facilities, cutting edge research laboratories or doctors with deep expertise in such fields, the United States is second to none.

This is not an oft brought point when discussing the merits of the U.S system despite its failings and short comings.

Also:

    The Fraser Institute, a Canadian public policy think tank, 
    estimates that 52,513 Canadians received non-emergency medical
    treatment in the U.S. and other countries in 2014, a 25 
    percent jump from the roughly 41,838 who sought medical care 
    abroad the previous year.

    In citing those numbers in its 2015 report, "Leaving Canada for 
    Medical Care," the organization said difficulties in obtaining 
    timely medical care at home is, increasingly, leading Canadians
    to seek it abroad. "It is possible [they] may have left the 
    country to avoid some of the adverse medical consequences of 
    waiting for care, such as worsening of their condition, poorer
    outcomes following treatment, disability, or death," the report 
    says. "Some may leave simply to avoid delay and to make a quicker
    return to normal life."

    Canadians could expect to wait 9.8 weeks for medically necessary
    treatment after seeing a specialist in 2014, the researchers found,
    three weeks more than the time physicians considered to be 
    clinically "reasonable."[1]

[1]

Canadians Increasingly Come to U.S. For Health Care / Crossing the Border for Care

https://www.usnews.com/news/best-countries/articles/2016-08-...