The team said Wednesday night the scan came back negative. Batum is day-to-day.
A source told ESPN the migraines were described as "excruciating" and that it's "a scary period" for Batum, a nine-year veteran.
Batum, 28, missed his second consecutive game Wednesday night, when the Hornets lost 98-77 to the Indiana Pacers. He is expected to be sidelined at least one more game.
Charlotte (29-38) has lost two straight games and is 3½ games off the pace for the eighth and final playoff spot in the Eastern Conference.
Batum is averaging 15.4 points, 6.7 rebounds and 5.9 assists this season.