After you start receiving disability benefits, you may want to try working again. There are special rules called "work incentives" that can help you keep your cash benefits and Medicare while you test your ability to work. For more information about the ways Social Security can help you return to work, ask for Working While Disabled - How We Can Help (Publication No. 05-10095). More detailed information about work incentives can be found in the Red Book (Publication No. 64-030). Also visit www.socialsecurity.gov/work .
Social Security Handbook