UEI
Unique Entity Identifier
Codes & ClassificationsDefinition
A 12-character alphanumeric identifier assigned to entities registering in SAM.gov, replacing the DUNS number.
More Information
The UEI is now the primary identifier for federal contractor registration. It is generated automatically when a business registers or renews in SAM.gov. Unlike DUNS, which was issued by a private company, UEI is assigned directly by the government at no cost.
Example
A business registering in SAM.gov receives a UEI like "ABCD1234EF56" as their unique federal identifier.