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The Unique Entity Identifier (UEI): Navigating the New Federal Identifier

In the realm of federal contracting and grants, identifiers play a vital role. For decades, businesses and organizations used the D-U-N-S Number as the primary identifier when dealing with the U.S. government. However, as of April 2022, the tide shifted in favor of a new system: the Unique Entity Identifier (UEI). This transition has left many wondering about the implications of the UEI, how it contrasts with the D-U-N-S Number, and how to obtain one. This article delves deep into these concerns, providing clarity and guidance on navigating the new federal identification landscape.

What is the UEI?

The UEI is a new identifier introduced by the U.S. government to serve as the primary means for recognizing entities that wish to conduct business with the government. This includes businesses, non-profits, and other organizations that aspire to participate in federal awards, like grants, contracts, and loans. The introduction of the UEI is a strategic move to foster a more transparent, controlled, and government-managed identification system, contrasting with the D-U-N-S Number that was managed by an external entity, Dun & Bradstreet.

A Brief History: The D-U-N-S Number

Before delving into the differences between the UEI and the D-U-N-S Number, it's vital to understand the legacy of the latter. The D-U-N-S Number, originating in the 1960s from Dun & Bradstreet, served as a global nine-digit identifier, providing insights into a business's legitimacy and financial health. The U.S. government had been leveraging the D-U-N-S Number for decades until the U.S. General Services Administration (GSA) announced in 2016 its intent to transition to a new government-owned identifier. This transition culminated in the official shift to the UEI in April 2022.

UEI vs. D-U-N-S Number: Highlighting the Differences

  1. Ownership: The D-U-N-S Number, being a product of Dun & Bradstreet, was owned and operated by this private company. The UEI, however, is a government-owned and managed system, specifically under the umbrella of the GSA.

  2. Application: Both identifiers function as unique tags for entities, but the D-U-N-S Number had a broader business and global context. The UEI has a specific focus on entities transacting with the U.S. government.

  3. Accessibility: The proprietary D-U-N-S system posed challenges in terms of free data sharing and distribution. With the government-controlled UEI, there's heightened transparency and accessibility.

  4. Format: The D-U-N-S Number consistently followed a nine-digit format, while the UEI offers more flexibility in its structure and length.

Acquiring a UEI: Steps for Businesses

For businesses seeking to transact with the U.S. government post-April 2022, acquiring a UEI is indispensable. Here's a step-by-step guide:

  1. Prepare Necessary Documents: Ensure you have all required documents handy. This often includes business licenses, tax identification numbers, and other certifications pertinent to your business.

  2. Visit SAM (System for Award Management) is the official platform where entities can register and obtain a UEI. Navigate to the website to begin the registration process.

  3. Create an Account: If you're new to, you'll need to create an account. Ensure you have all necessary information available.

  4. Complete Entity Registration: Within the SAM system, follow the prompts to complete your entity registration. During this process, you'll be provided a UEI.

  5. Regularly Update Information: It's essential to keep your entity's information current. Regularly log into to ensure all details remain accurate and up-to-date.

Still Have a D-U-N-S Number?

If you previously had a D-U-N-S Number and are transitioning to the UEI system, it's worth noting that while the UEI will become the primary identifier, the D-U-N-S Number may still have utility in non-federal contexts given its global recognition.


The shift from the D-U-N-S Number to the UEI in April 2022 underscores the U.S. government's dedication to modernization, transparency, and autonomy. While the D-U-N-S Number reliably served for many decades, the dawn of the UEI heralds a new era of improved clarity, governance, and self-reliance for entities transacting with the U.S. government. As businesses and organizations adapt to this change, it remains paramount to stay informed, ensure compliance, and keep abreast of the latest requirements, primarily via the portal.


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