My husbands hematologists ( had 2n opinion ) both said not to worry about the ferritin (17) .. need to get Hct down from 51 to below 45 with phlebotomies. Last week the he was at his primary Dr , I asked him to repeat the ferritin/ iron blood test ( My old primary care Dr ALWAYS repeated blood tests if they were out of range) and sure enough , this time the ferritin was OK and the iron was high... So now I guess one more blood test to determine which one is correct!