NOTE: The National Disability Determination Services System (NDDSS) was changed to preclude
the entry of VR referral coding with the exception of “N” (Not referred for Vocational
Rehabilitation), and “C” (Child Claimant Referred to State Agency Responsible for
Administering the Title V Agency Program in the State). Neither of these codes is
shown on Form SSA-831. The NDDSS inserts the code “N” on the database and displays
it on a query response if the VOC field is left blank.