It depends on the state. Each state has their own qualifications and criteria for the disabled/seniors.

When I was approved for SSDI back in 2005, my local SS office sent me a booklet outlining everything the disabled/seniors were entitled to in my state and local county.

All you need to qualify for most of the entitlements is a Medicare card. Income does not come into play. Again, it depends on your state and/or county programs.