If you were born outside of the U.S. and were given BCG, there is a possibility that TB test will come out reading positive.
I told my physician that and he skipped the skin test and just had me do chest x-ray, which of course was negative.
I dont know why they would reject it if you are negative on the skin test. However they seem to use different standard for people who were born outside the US. I was told that 10mm would be positive for me when its like 15 or 20mm for person born in US, not sure how true that is, but was told so by doctors in Kaiser.