You might remember my previous post: idiopathic B12 deficiency for 20 years. Always supplement. Usually test 400-600. Got a result of 1980+ but had taken a sublingual an hour before test.
I want to re-test to be sure this is not a sign of a "malignant process" (excessive serum b12 can be).
Blue Cross says serum B12 is no longer considered the go-to, valid test for deficiency. Therefore they won't cover (despite covering it in my well visit in the first place)
Blue Cross says that trans(holo?)cobalamin test is still "investigational." Therefore they won't cover.
So do you recommend I pay out of pocket for serum test -- despite it being a poor measure -- just to get apple-to-apple comparison to reassure me about "malignant processes?"
Should I also order any other tests and be prepared to pay out of pocket? (My folate has always been just fine.)
Thanks in advance!