Reference · Registration & identifiers
UEI
Unique Entity Identifier
The Unique Entity Identifier (UEI) is the 12-character alphanumeric ID that identifies an organization in SAM.gov for federal awards. It replaced the DUNS number in 2022 and is assigned when an entity registers.
What it is
The UEI is generated in SAM.gov and is the government's official identifier for an entity across grants and contracts. Unlike the former DUNS number, it is issued by the government, not a third party.
Why it exists
It gives federal award systems a single, government-owned identifier for each entity, ending reliance on the proprietary DUNS number.
Who it applies to
Any organization seeking federal contracts or grants — obtaining a UEI is part of the SAM.gov registration process.
Frequently asked
What is a UEI number?
The UEI (Unique Entity Identifier) is a 12-character ID that identifies an organization in SAM.gov for federal contracts and grants. It replaced the DUNS number in 2022 and, unlike DUNS, is assigned by the government when an entity registers.
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