Officials said DesJarlais is now working with Capitol Police, congressional leadership and his staff to review and improve safety measures.
The gunman, James T. Hodgkinson, was shot and killed by police. Authorities said he was armed with a rifle and lots of ammo at the time.The shooting, which injured House GOP Whip Steve Scalise and others, happened last Wednesday morning. Scalise remains hospitalized and has since undergone surgery.
Authorities said Hodgkinson had a history of anti-GOP activity.
The investigation is ongoing.