What is a normal iron level?

[pipsnum]

I have undergone several blood tests and most doctors have said my iron level, hemoglobin, and so forth are all normal. A doctor at a hair loss center (not a hospital) says other doctors have misread the results, saying that 12.9 hemoglobin level is not normal and that my iron level is actually low. So, I did a hair analysis showing that my magnesium and iron levels are low. However. the most recent blood test indicates my ferritin level to be 34.7 ng/mL. Is this normal? What the doctors tell me from my blood test results is that everything is normal and yet, this other doctor says they have misread the results. I've read on other posts on women's hair loss sites that doctors frequently think that your iron levels are normal when they aren't. Please respond. I am having a hard time with doctors.