Social Security & Medicare

Another is whether medical improvement is "possible" or "unlikely". $1040 is the maximum you can earn while on SSDI. If medical improvement is possible, SSA may review your eligibility in 3 years from the start date of your benefits. If unlikely, SSA may review eligibility in 7 years from the start date. If your medical disability determination is considered terminal, i.e. will result in death, SSA takes that into consideration of your ongoing eligibility.

Also considered is what type of work you are able to do or are doing in comparison with your previous work history. And the hours per month you are capable of working.

One thing to keep in mind - SSA has a specific definition of disability. It must be determined to be permanent, not short-term or intermittent. If you are currently on SSDI, that determination has already been made. Periodic reviews are customary and, iirc, required by law.

It is important to maintain all medical / medication histories current. That includes consults, one-time visits referred by your primary care provider, etc. All are part of the overall picture of your situation(s).

Overviews are here -

http://www.ssa.gov/dibplan/#sb=-1