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Each SCTID (data type) identifies a. Theitself does not contain information related to the meaning of aor. This means it is not possible to infer anything about the meaning of afrom the numeric value of theor from the sequence of digits in that form of the identifer. The meaning of acan be determined fromto otherand from associatedthat include human readable terms.

The SCTID (data type) does however have a structure which includes valuable information about the nature and source of the identified component and the validity of the. This structure supports the following features:

  • validation of the.

    • Theis the final digit in the decimal rendering of the. This can be checked to minimize errors from transcription or incomplete copy-paste actions.

  • Partitioning betweenfor different types of.

    • A two-digitdistinguishes theof different component types and prevents the samefrom being allocated to both aand a. As a result, when an SCTID (data type) is read from a record or other resource, it is possible to determine whether it represents a, aor a, before searching for the identified component.

  • Namespaces to separate componentoriginated by different organizations.

    • Organizations are only permitted to issuewhich fall within a specified namespace of potentialvalues. This prevents collisions betweenissues by different organizations which would otherwise result in ambiguity and errors when sharing data.

    • There are two formats used for representing namespaces.
      • Short format in whichare reserved for an organization which is permitted to issue any validwithin the allocated partitions. The short format approach does not require a specificand is only applicable to components originated and maintained by theas part of theof.

      • Long format in which thevalue indicates that a separateis required to distinguish between components originated as part of ancreated by an appropriately authorized organization .

Figure 28. SCTID Short Format - Applicable to components originating from the International Release

Figure 29. SCTID Long Format - Applicable to components originating from a SNOMED CT Extension

Note: Theallocatesto organizations such asandto enable them to create content and or derivatives in an. Theenables unique SCTID (data type) to be issued by many organizations and allow each SCTID (data type) to be traced to an authorized originating organization .


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