So I just applied for SSDI after reading that we can get it while active duty. I'm towards the end half of my med board so I figured why wait until I'm out. Anyways. I'm reading that everyone is getting approved rather quickly but is getting approved the same as receiving payments? How soon after being approved will payments start being received? And if my conditions limited my duty starting May 2015 will I get back pay from SSDI or nah?