If the doctor has been chosen by you or your employer after you were notified of your right to choose by your employer, you can't change doctors unless your employer agrees or the court orders a change. If you want to change, talk to your employer about the reasons. If your employer agrees, you may change. If your employer does not tell you about your right to choose a doctor, you may change doctors without your employer's agreement.
To learn more check out Nebraska Worker's Comp.