Why Does the "Medicaid Amount Reimbursed" and the "Non-Medicaid Amount Reimbursed" not equal the "Total Amount Reimbursed" in the State Drug Utilization Data (SDUD)?

The sum of the “Medicaid Amount Reimbursed” and the “Non-Medicaid Amount Reimbursed” fields should generally equal the Total Amount Reimbursed on a National Drug Code (NDC) by NDC basis; however, these new fields were implemented beginning with the fourth quarter of 2007 and are optional for the states to report prior to that time. Therefore, for quarters earlier than fourth quarter 2007, there may be some large discrepancies between the Total Amount Reimbursed and the sum of the Medicaid Amount Reimbursed and the Non-Medicaid Amount Reimbursed because the Non-Medicaid Amount Reimbursed is often not present for those earlier quarters. Should you notice apparent discrepancies in an individual state's utilization data, your questions should be directed to the State Technical Contact.