Make sure that you inform him of the change before you've submitted a payment for the item you want to make changes to. You can only change the shipping method and cost on invoices that have not been paid and that are for listings that ended within the past 30 days.
1 Nebraska Department of Health and Human Services System. 301 Centennial Mall South. Lincoln, NE 68509.  The phone number to call the Nebraska Medicaid office is 855-632-7633 or in state call 402-471-3121.
Below is the contact information for the Medicaid office in Nebraska. They can assist you with questions or concerns about the Nebraska Medicaid program, including the eligibility requirements and Medicaid enrollment in Nebraska. You can view their site online at http://dhhs.ne.gov/Pages/default.aspx. To find out if you are eligible for this program, Nebraska Medicaid eligibility.