When I got SSDI I was designated as long term. I don’t recall the proper terminology but it was years before they contacted me. They just sent me a form occasionally that asked the name of my doctors and dates of if any hospitalizations. I think in thirty years I got maybe three forms to fill out. I never heard back from them after filling out the forms. No idea if they contacted drs and hospitals to follow up on veracity. I’m 65 now.