Is having a feritin level of 4 bad for a 15 year old male?
It depends what unit of measurement you're using. According to the Wikipedia article on Ferritin - normal levels are "...usually between 30-300 ng/mL (=μg/L) for males, and 15-200 ng/mL (=μg/L) for females..." - See related link for a full article on the substance.