limitations on organ donation

so i went to the dmv today to get my driver’s license upgraded and i started thinking about organ donation, since there’s that little box on the back that you’re supposed to check if you want to be a donor.

i have three auto-immune disorders: rheumatoid arthritis, lupus, and thrombocytopenia. i can’t donate blood. am i allowed to donate my organs? what are the limitations on donation?