Visiting Program participants must request DIS approval in the following circumstances:

1. You plan to pursue research activities abroad (other than short travel to attend conferences or meetings) for more than five weeks, or
   
2. You plan to take extended personal leave for more than five weeks. This includes vacation and medical leave.

Scientists must submit the Request for Extended Absence from NIH form with an accompanying memo to DIS at least two weeks before their planned absence from NIH. Memo requirements are listed on the request form. DIS will review your request and determine whether you are eligible to preserve your U.S. immigration status and return to NIH after the planned absence.

If you plan to pursue research or other outside activities without taking an extended absence (more than 5 weeks) from NIH, review our Outside Activity page to determine next steps.