Others titles

  • SNOMED CT and ICD-10-CM Cross Mapping
  • Mapping of SNOMED CT Snapshot Extended Map Refset and ICD-10 CM


  • Clinical Terminology
  • ICD-10-CM Codes
  • Systematized Nomenclature of Medicine Clinical Terms
  • Healthcare Terminology Mapping
  • Electronic Health Records
  • SNOMED to ICD-10 Map

SNOMED CT Snapshot Extended Map Reference Set to ICD-10-CM Map

This dataset is one of the three separate files that the ICD-10-CM MAP contains. Extended Map contains the core publication of MAP data. There are one or more map records for each source concept mapped, including the ICD-10-CM target codes. This dataset is an update of the SNOMED CT to ICD-10-CM Cross Map. The purpose of this update is to synchronize with the latest release of the US Edition of SNOMED CT by removing obsolete content.

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The mapping in this dataset is identified by the refsetid 6011000124106. Extended Map contains the core publication of MAP data. There are one or more map records for each source concept mapped, including the ICD-10-CM target codes.

SNOMED CT is an extensive clinical terminology that was formed by the merger, expansion, and restructuring of SNOMED RT (Reference Terminology) and the United Kingdom National Health Service (NHS) Clinical Terms (also known as the Read Codes). It is the most comprehensive clinical vocabulary available in English (or any language). SNOMED CT is concept-oriented and has an advanced structure that meets most accepted criteria for a well-formed, machine-readable terminology. It has been designated as a US standard for electronic health information exchange in Interoperability Specifications produced by the Healthcare Information Technology Standards Panel and has also been adopted for use by the US Federal Government, through the Consolidated Health Informatics (CHI) Initiative, for several clinical domains.

This cross map is a directed set of relationships from SNOMED CT source concepts to ICD-10-CM target classification codes. The SNOMED CT source domains for this mapping are limited to subtypes of 404684003 |clinical findings|, 272379006 |event| and 243796009 |situation with explicit context|.

This update of the map includes:
– 100,185 SNOMED CT source concepts including:
– 94,844 clinical findings
– 2,813 events
– 2,528 situations with explicit context
– 5,696 source concepts could not be assigned a map target due to issues of ambiguity or target scope
– A total of 168,810 map records, with a maximum of 23 map records per map group

About this Dataset

Data Info

Date Created


Last Modified




Update Frequency


Temporal Coverage


Spatial Coverage

United States


John Snow Labs; International Health Terminology Standards Development Organization (IHTSDO), U.S. National Library of Medicine (NLM);

Source License URL

Source License Requirements


Source Citation



Clinical Terminology, ICD-10-CM Codes, SNOMED CT, Systematized Nomenclature of Medicine Clinical Terms, Healthcare Terminology Mapping, Electronic Health Records, SNOMED to ICD-10 Map

Other Titles

SNOMED CT and ICD-10-CM Cross Mapping, Mapping of SNOMED CT Snapshot Extended Map Refset and ICD-10 CM

Data Fields

Name Description Type Constraints
Map_Record_IdAn unsigned integer, uniquely identifying the map record.stringrequired : 1
Effective_TimeSpecifies the inclusive date at which this change becomes effective.daterequired : 1
Is_ActiveSpecifies whether the member’s state was active (=1) or inactive (=0) from the nominal release date specified by the effectiveTime field.booleanrequired : 1
Module_IdIdentifies the member version’s module. Set to a child of 900000000000443000|Module| within the metadata hierarchy.integerlevel : Nominalrequired : 1
Refset_IdSet to one of the children of the |Complex map type| concept in the metadata hierarchy.integerlevel : Nominalrequired : 1
Referenced_Component_IdThe SNOMED CT source concept ID that is the subject of the map record.integerlevel : Nominalrequired : 1
Map_GroupAn integer identifying a grouping of complex map records which will designate one map target at the time of map rule evaluation. Source concepts that require two map targets for classification will have two sets of map groups.integerlevel : Nominalrequired : 1
Map_PriorityWithin a map group, the Map_Priority specifies the order in which complex map records should be evaluated to determine the correct map target.integerlevel : Nominalrequired : 1
Map_RuleA machine-readable rule, (evaluating to either ‘true’ or ‘false’ at run-time) that indicates whether this map record should be selected within its map groupstringrequired : 1
Map_AdviceHuman-readable advice that may be employed by the software vendor to give an end-user advice on selection of the appropriate target code. This includes a) a summary statement of the map rule logic, b) a statement of any limitations of the map record and c) additional classification guidance for the coding professional.stringrequired : 1
Map_TargetThe target ICD-10 classification code of the map record.string-
Correlation_IdA child of |Map correlation value| in the metadata hierarchy, identifying the correlation between the SNOMED CT concept and the target code.integerlevel : Nominalrequired : 1
Map_Category_IdIdentifies the SNOMED CT concept in the metadata hierarchy which is the Map_Category for the associated map record. This is a subtype of 447634004 |ICD-10 Map Category value|.integerlevel : Nominalrequired : 1

Data Preview

Map Record IdEffective DateIs ActiveModule IdRefset IdReferenced Component IdMap GroupMap PriorityMap RuleMap AdviceMap TargetCorrelation IdMap Category Id
80004cdf-a114-59c8-88a2-b6f0283acf4f2018-03-01True5991000124107601100012410612804100011910711IFA 721617001 | Primary adenocarcinoma of lower third of esophagus due to Barrett esophagus |IF PRIMARY ADENOCARCINOMA OF LOWER THIRD OF ESOPHAGUS DUE TO BARRETT ESOPHAGUS CHOOSE K22.70 | MAP OF SOURCE CONCEPT IS CONTEXT DEPENDENTK22.70447561005447639009
80005aeb-477c-53dc-9a5c-ce723ca264cb2015-07-31True44908000644756200325415300911TRUEALWAYS Q79.8Q79.8447561005447637006
80007b64-5a60-5556-88ce-22ef540a3ea52018-03-01True5991000124107601100012410628180100000910822OTHERWISE TRUEALWAYS B96.89B96.89447561005447637006
80007e6a-7408-5b87-a1ec-70b2128114102019-07-31True4490800064475620031662396100011910011TRUEALWAYS D61.1D61.1447561005447637006
80009454-5531-5f78-b7c9-d288f2346d832019-01-31False44908000644756200330132700211TRUEMAP SOURCE CONCEPT CANNOT BE CLASSIFIED WITH AVAILABLE DATA447561005447638001
8000a5af-6962-5385-9227-4038d1f7b2372015-07-31True44908000644756200324695100111TRUEALWAYS H10.8H10.8447561005447637006
8000fff7-d0ac-5ad4-82eb-f8e0a37ebfc72019-03-01True5991000124107601100012410629227800611TRUEALWAYS T43.595? | CONSIDER ADDITIONAL CODE TO IDENTIFY SPECIFIC CONDITION OR DISEASE | EPISODE OF CARE INFORMATION NEEDEDT43.595?447561005447637006
80010c58-f11f-572f-98f9-852cd301d5c02020-01-31False44908000644756200329171000521TRUEALWAYS X44 | POSSIBLE REQUIREMENT FOR PLACE OF OCCURRENCEX44447561005447637006
80012ff2-8b86-58c8-b924-edc2f74ecf082018-09-01False5991000124107601100012410629307200512IFA 293074006 | Cycloserine adverse reaction |IF CYCLOSERINE ADVERSE REACTION CHOOSE T37.1X5? | CONSIDER ADDITIONAL CODE TO IDENTIFY SPECIFIC CONDITION OR DISEASE | EPISODE OF CARE INFORMATION NEEDED | MAP OF SOURCE CONCEPT IS CONTEXT DEPENDENTT37.1X5?447561005447639009
80013426-c025-5e9a-9274-d1268b7f830d2013-07-31True44908000644756200347275900311TRUEALWAYS I27.2I27.2447561005447637006