My sister, who eats pretty much the same diet as me, recently got a blood test and it came back with dangerously low levels of iron (to the point where the doctor said she was at risk of a heart attack). I would like a blood test to see if my diet is good enough or if I'm deficient in anything.

If I go to the doctor, what should I say to get it covered by medicare? If I tell them that I'm worried I'm deficient, would that work? Or would I have to pretend to be suffering from something like an iron deficiency?