I have, Larz...but mine was for my neck to toe body rash not nasal, pollen dust allergies. From my research they mainly specialize in respiratory allergies and not like the autoimmune disease stuff...so he wasn't a good find for me.
But he ran the immunology blood test at my request, okay demand...and it revealed I was having a high histamine reaction to something, but no one could tell me what specifically.
So, it maybe a great thing to go...and it could just be from dust, ragweed, mold and a shot in the arm will do ya...
Cost..it will fall under your co-insurance I believe, for tests.....mine is 10%.
I have Lupus. So *^#@! what.