In order to be considered for a program extension your department must contact a Center for Global Engagement (CGE) advisor to request the form at least 30 days prior to the expiration of your current DS-2019. A DS-2019 program extension will not extend your visa. It will allow you to remain in the U.S. (even if your visa has expired) to complete your program until your revised program end date. You will need to show appropriate funding amounts and health insurance for the new program duration.
You cannot extend past the maximum allowed time in your J category. Not all extensions will be possible.