Nurse Terri Edens wrote an essay for a contest in January detailing the efforts of ER nurses after the deadly tornado last year.
Mercy's ER nurses received the Best Nursing Staff of 2012 award from the Advance for Nurses magazine.
Nursing teams told how they excelled in patient care under extreme conditions.
The Joplin team held a ceremony and took turns reading from the winning essay.
"It's kind of in my mind an award for all nurses in the whole area and the whole community," says Mercy nurse Terri Edens.
Joplin's Mercy Hospital was one of ten hospitals across the country chosen to receive the award.