My B 12 level was 766 vit D level at 40. All blood work good. Had CSF work done one yrs. after I got sick my Igg levels were at 468. I had IV Igg for a long time and then yrs. after I did it subQ at home. It brought my levels up to 667. They have stayed the same for about a yr. now. But now I don't have any insurance- I can't go to any doctor anymore. I just want to give up totally.