First, log in to your account. If you are in a group practice, the group's 'Head Honcho' must be the one to log in.
- Click 'More...' on the left hand side blue buttons
- Click on the grey button labelled 'Preferences'
- Click on the bottom most section labelled 'Account Management' or Practice Group Membership and Privileges'
- Click 'Update Charge Card' button, and follow the prompts to change the credit card info.