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AI summary

What is a UEI number?

What is a UEI number?

A UEI is the twelve-character Unique Entity Identifier assigned through SAM.gov for entities that register or need identification in federal award systems. It replaced DUNS as the federal government's primary entity identifier in those systems. A UEI links source records, but its presence or absence alone does not decide registration, exclusion, or award eligibility.

Published
2026-07-20
Retrieved
Not reported
Snapshot
sha256:16d90f7c15c3a444fe98d2999c4c0d326e7ec243a6d87b160449f07bf3a41e31
Data as of
2026-07-20

Source artifact receipts

Each receipt below describes its exact retained artifact or live source. Dates and digests never cross artifact boundaries.

Unique Entity Identifier guidance

Evidence publisher: U.S. General Services Administration. Source date: 2026-07-20.

Published
Not reported
Retrieved
Not reported
Snapshot
Not retained for this live source artifact
Data as of
2026-07-20

No captured bytes are represented; use the live publisher link to re-check this source.

Scope and material limitation

What this answer covers

This answer covers the SAM.gov UEI and not other identifiers that an entity may hold. Current status must be read from the relevant official record.

Dated source facts

What the cited record says

Source-snapshot manifest receipt

Reproducible lineage, explicitly unsigned

This receipt attests the source snapshot manifest, not any individual fact.

The answer-series chain record is unsigned. It does not authenticate a person, organization, eligibility state, or individual fact.

Snapshot manifest SHA-256
b204121791b7a5866990bae39979c70c116e8dfb3611f316e250048898987cfb
Previous chain SHA-256
fd6774d587be1e8cfd9ae1ec6ae14a1434d18fc4f79d448c6fc82dabfcca6d20
Current chain SHA-256
46b187bdaac0278e105d1a442d7b8daac22ef61109d4ad7508207e2d96944c79
signature_linked_facts
0
Answer-series chain status
unsigned

Primary-source chain

Follow the answer to its source

  1. Unique Entity Identifier guidanceU.S. General Services AdministrationAccessed:

    Limitation: A UEI is an entity identifier used by federal award systems. Possession or absence of a UEI alone is not an award or eligibility conclusion.

Re-derive this answer from the cited government file; no Fonteum account is required.

Methodology and limitations

How to interpret this answer

Methodology version: citation-answer/v1

  • No registration or eligibility status is inferred from the identifier alone.
Read the methodology

Frequently asked questions

Questions about this answer

Did UEI replace DUNS for federal awards?
Yes. The UEI became the primary entity identifier used by the federal award systems covered by SAM.gov guidance.

Cite this page as Fonteum, “What is a UEI number?,” published , modified .

Found a source or interpretation issue? Review the corrections log.

What’s on file, by the numbers

Platform snapshot · 2026-08-23

13.4Mproviders & companiesProviders, organizations, owners, and facilities on file
26.2Msource-linked factsSource-linked field facts in the dated platform snapshot
90sources with dataDistinct snapshot source IDs with at least one positive record count
70fresh sourcesDistinct source IDs whose latest positive-data snapshot falls within the preceding 45 days
111sources integratedActive registry rows; integration does not establish a load
13state Medicaid jurisdictionsDistinct states represented in the state-exclusions serving table

Integrated, with-data, and fresh-observation counts are separate. No platform-wide source-completeness count is published. Completeness is source-specific and must be evaluated against the named source's expected scope. State coverage is a separate jurisdiction measure.

Source authority is record-specific

Use the issuer named on the record.

Fonteum spans federal, state, and global public publishers. A source page or returned record identifies its issuer and dataset where that metadata is available. A platform registry count does not assign every page to one authority or establish loaded, fresh, or complete coverage.

Browse source records and their stated limitations →

Reproducible by design

Inspect the evidence each published figure actually supplies.

Source and date

Research pages expose the named public file and observation date where those fields are available. Source-file SHA-256 coverage is separate; facts do not currently link deterministically to signatures.

Available derivation

Studies with a retained release and committed derivation link the SQL or method used. Other studies state the evidence and reproduction limits they actually have.

Daily observations

Dated table row-count observations can detect local drift. They do not imply that an upstream publisher released or Fonteum ingested new data that day.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

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