Thanks for the info everyone. Yes, 900 is right. I asked him again just to be sure.

No he isn't overweight. The only other medical condition he has is diabetes type 1. Can that somehow make his cholesterol be high like that? I'm just wondering if anyone knows.

The doctor has him on 2 different cholesterol medicines, and he was already on a pretty strict diet. As far as I know he follows the diet well.. but I could be wrong. His levels have always been a little high.. but never 900! I'm going to do all I can to help him stick to his diet and meds. It scares me to know that his cholesterol is at a dangerously high level.

Thanks everyone for helping me understand this a little better.