I live in New Jersey and went to file for Welfare to get medical assistance to get surgery on my knee since I went to the hospital and they think tore my ACL,PCL and meniscis. I have no insurance so I needed Medicaid. The In-take Worker told me that someone else was using my Social Security Number and that I should check into it. Is this considered Identity Theft? And what should I do to take care of this? Also is there a way a lawsuit might be involved? I was able to get the persons last name who used my Social Security Number, What should I do?