appears_in: []
contributor:
  email: cthoyt@gmail.com
  github: cthoyt
  name: Charles Tapley Hoyt
  orcid: 0000-0003-4423-4370
depends_on: []
deprecated: false
description: An identifier for an atom; the smallest unit of naming in a source, viz,
  a specific string with specific code values and identifiers from a specific source.
  As such, they can be thought of as representing a single meaning with a source Atoms
  are the units of terminology that come from sources and form the building blocks
  of the concepts in the Metathesaurus.
example: A0118748
homepage: https://www.nlm.nih.gov/research/umls
keywords: []
mappings: {}
name: Unified Medical Language System Atomic Unique Identifier
pattern: ^A\d+$
preferred_prefix: umls.aui
prefix: umls.aui
providers: []
publications: []
synonyms:
- UMLS_ICD9CM_2005_AUI
