Hi Elisa,
I would most certainly go to Shriners in Portland if at all possible, for the sake of a second opinion if nothing else. Your canadian insurance does not need to know, and I am appalled that a secretary would threaten you that they wouldn't see your son if you went to shriners. I would demand to see that policy in writing before worrying about it.
We ultimately discontinued care in Portland because we felt strongly that we wanted Leah to have vertebral stapling (VBS), which they do not offer in Portland. But If your son needs a brace and you were to decide to try that route, they do have a great orthotics guy, Don Hayhurst, who is a fantastic brace maker. And, amazingly, all care at Shriners is free of charge, and you do not need a sponsor.
If I was in your shoes I would not be very happy waiting some long, indeterminate length of time to be seen by the orthopedist. Especially if the curve is 38 degrees and you want to pursue bracing. If the curve is well into the 40's, you would still get a thorough evaluation in Portland.
You can PM me if you'd like to hear more about our experiences in Portland.
Gayle
Gayle, age 50
Oct 2010 fusion T8-sacrum w/ pelvic fixation
Feb 2012 lumbar revision for broken rods @ L2-3-4
Sept 2015 major lumbar A/P revision for broken rods @ L5-S1
mom of Leah, 15 y/o, Diagnosed '08 with 26* T JIS (age 6)
2010 VBS Dr Luhmann Shriners St Louis
2017 curves stable/skeletely mature
also mom of Torrey, 12 y/o son, 16* T, stable