I recently applied for SSDI and SSI. I just received my denial letter for SSDI saying that there was not enough medical evidence prior to my date last insured. A few days after my denial letter, I received a letter from SSI that said Important Information on the top left hand corner. It said that I am scheduled for a phone interview in a week. I know that SSDI and SSI are different but if I was denied SSDI doesn't that mean I was denied SSI too and why do they want to bother to have me do a phone interview? I am very confused and new at all of this.