Two things can cause Social Security to decide that you are no longer disabled and to stop your benefits.
Your disability benefits will stop if you work at a level they consider “substantial.”In 2016, average earnings of $1,130 or more per month ($1,820 or more per month if you are blind) are usually considered substantial.
Your disability benefits also will stop if the decide that your medical condition has improved to the point that you are no longer disabled. Ongoing Continuing Disability reviews are mandated by law. If your doctor will say there has been no change or improvement in your condition, that is usually enough to stop the review. Be certain to promptly appeal all negative decisions.
You are responsible for promptly reporting any improvement in your condition, if you return to work, and certain other events as long as you are receiving disability benefits. Be sure to send CERTIFIED letters when making a report of income.