When Social Security Disability decides to send you to a doctor they may believe that you are potentially eligible to get Social Security Disability.
So it can be a good sign that you're being sent to a doctor for an exam for Social Security Disability because it means that you're another step towards getting social security.
But being sent to the doctor for an exam but Social Security Disability does not guarantee you'll be approved for the disability payments.
If you do however have a health condition that does prevent you from working a job then you will likely get approved for the social security disability payments.
The doctor you're being sent to checks you over and states whether or not you have a condition that prevents you from working.
If you do have a condition that does prevent you from working and the social security disability doctor you're sent to agrees then you'll almost always get approved for Social Security Disability.