When you schedule an online exam, you will receive a confirmation email from the exam provider. This email, which comes from donotreply@examity.org, links to detailed instructions about Preparing For and Taking Your Exam. At that site, you are instructed as follows if you need to reschedule or cancel:

1. Login to ‘CMS TESTWise’ (https://delivery.itemexperts.com).
2. Click either the "Reschedule exam" or "Cancel exam" button. 
3. Follow instructions on screen.

You will be charged $5 if you cancel or reschedule within 24 hours of your exam appointment.