Supreme Court Justice Ruth Bader Ginsburg broke three ribs after falling in her office on Wednesday evening.
The 85-year-old initially went home after the fall, but later went to George Washington Hospital to be checked out on early Thursday morning after experiencing some "discomfort," the court said in a statement.
She's been admitted for "observation and treatment," according to the statement.
Further details were not immediately available.
Ginsburg previously broke two ribs in 2012 after a fall.