The 25-year-old Californian has the fourth-fastest time in the 800m this year.
She wanted to race the 1500m as well, but a clerical error cost her a spot in that event.
Bernard Lagat, Ryan Hill, and Galen Rupp all run qualifying times.
In just over a year, the American has become a world-class steeplechase runner.
American Shalane Flanagan was eighth.
Valentine Jepkorir was able to catch a flight to Moscow two days later.
The 1500m champion has a vertical tear in her hamstring.
He says he's better than he was when he won two Olympic gold medals last summer.
The California resident steps up her final preparations with a marvelous time at the TD Beach to Beacon 10-K last weekend.
He is the man to beat in Moscow.