SNOMED Clinical Terminology Delta

**Overview**
SNOMED CT contains three different release file types in every version: full, delta and snapshot release. This data package consists of Delta Release which contains only the additions and changes since the previous release.

**Description**
SNOMED CT is one of a suite of designated standards for use in U.S. Federal Government systems for the electronic exchange of clinical health information and is also a required standard in interoperability specifications of the U.S. Healthcare Information Technology Standards Panel. When implemented in software applications, SNOMED CT can be used to represent clinically relevant information consistently, reliably and comprehensively as an integral part of producing electronic health information. SNOMED CT supports the development of comprehensive high-quality clinical content in health records. It provides a standardized way to represent clinical phrases captured by the clinician and enables automatic interpretation of these. SNOMED CT is a clinically validated, semantically rich, controlled vocabulary that facilitates evolutionary growth in expressivity to meet emerging requirements. SNOMED CT based clinical information benefits individual patients and clinicians as well as populations and it supports evidence based care. A 'Delta' release contains only those component versions created, inactivated or changed since the previous release. The 'Delta' release is much smaller than a 'Full' release and is ideal for updating a 'Full' release of the previous version.

**Benefits**
- there are many benefits of using snomed ct in electronic health records including:
- health information can be shared consistently within and across healthcare settings.
- data can be organized, queried, and analyzed for the benefit of the individual and institution.
- the risk of different interpretations of the record between different healthcare settings can be reduced.
- updated twice a year to help users keep pace with the advances of healthcare terminology and add to the scope of coverage
- in addition to adding value to electronic health records, snomed ct supports the following meaningful use objectives:
- maintain an up-to-date problem list of current and active diagnoses
- record patient family health history as structure data
- identify and report cancer cases to state cancer registries
- record and track changes in patient vital signs
- record patient smoking status
- provide a summary record for each transition of care

**License Information**
The use of John Snow Labs datasets is free for personal and research purposes. For commercial use please subscribe to the [Data Library](https://www.johnsnowlabs.com/marketplace/) on John Snow Labs website. The subscription will allow you to use all John Snow Labs datasets and data packages for commercial purposes.

**Included Datasets**
- [SNOMED CT Delta Association Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-association-reference-set)
- This dataset is a component reference set used to represent a set of unordered associations of a particular type between components of SNOMED CT.
- [SNOMED CT Delta Attribute Value Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-attribute-value-reference-set)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

Attribute value reference set is a component reference set used to apply a tagged value to a SNOMED CT component.
- [SNOMED CT Delta Concept](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-concept)
- The Concept file holds the clinical concepts that makeup SNOMED CT. A concept is given meaning by its Fully Specified Name, which is held in the Description file. A concept is distinguished from or refined by association with other concepts using relationships in the Relationship file. This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems.
- [SNOMED CT Delta Description](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-description)
- The Description file holds descriptions that describe SNOMED CT concepts. A description is used to give meaning to a concept and provide well-understood and standard ways of referring to a concept. This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems.
- [SNOMED CT Delta Language Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-language-reference-set)
- A Language reference set is a component reference set that is used to indicate which descriptions contain terms that are acceptable or preferred in a particular language or dialect. This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems.
- [SNOMED CT Delta MRCM Attribute Domain Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-mrcm-attribute-domain-reference-set)
- MRCM (Machine Readable Concept Model) Attribute Domain Reference Set allows attributes to be associated with the domains in which they may be applied. It also allows grouping and cardinality constraints to be specified for each attribute and domain combination. For each attribute-domain rule, the strength of the rule and the content type over which this rule applies is also specified.
- [SNOMED CT Delta MRCM Attribute Range Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-mrcm-attribute-range-reference-set)
- An MRCM (Machine Readable Concept Model) Attribute Range Reference Set allows attributes to be associated with a valid value range for a given SNOMED CT content type and rule strength. The range of each attribute is defined using an Expression Constraint. This expression constraint represents the set of concepts, expressions, or concrete values that may be used as the value of the given attribute.
- [SNOMED CT Delta MRCM Domain Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-mrcm-domain-reference-set)
- This dataset enumerates the concept domains to which SNOMED CT attributes may be applied. Each concept domain is uniquely identified by a SNOMED CT concept. When the scope of a domain covers the concepts in a particular hierarchy (or subhierarchy), the supertype concept of this hierarchy (or subhierarchy) is used to identify the domain. When a domain is defined based on membership in a reference set, the associated reference set concept is used to identify the domain.
- [SNOMED CT Delta Module Dependency Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-module-dependency-reference-set)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

The Module dependency reference set is used to represent dependencies between modules, taking account of module versioning.
- [SNOMED CT Delta OWL Expression Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-owl-expression-reference-set)
- This dataset is an OWL (Ontology Web Language) ontology reference set (foundation metadata concept), in which the OWL expressions represent essential information about an ontology. This information includes namespaces, ontology URI (Uniform Resource Identifier), ontology version URI, and import statements. An OWL expression type reference set associates description logic statements with SNOMED CT (Systematized Nomenclature of Medicine Clinical Terms) concept in the OWL functional syntax.
- [SNOMED CT Delta Refset Descriptor Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-refset-descriptor-reference-set)
- This dataset describes the Delta Refset Descriptor Reference Set of SNOMED CT (SNOMED Clinical Terminology, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.
- [SNOMED CT Delta Relationship](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-relationship)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

The Relationship file holds one relationship per row. Each relationship is of a particular type, and has a source concept and a destination concept.
- [SNOMED CT Delta Simple Map Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-simple-map-reference-set)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

A Simple Map Reference set is used to represent one-to-one maps between SNOMED CT concepts and codes in another terminology, classification or code system.
- [SNOMED CT Delta Simple Reference Set](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-simple-reference-set)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

A Simple reference set does not have any additional fields.
- [SNOMED CT Delta Stated Relationship](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-stated-relationship)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.

Stated Relationship File is a distribution file containing the stated form of SNOMED CT relationships.
- [SNOMED CT Delta Text Definition](https://www.johnsnowlabs.com/marketplace/snomed-ct-delta-text-definition)
- This dataset describes the Release File structure of SNOMED CT, referred to as Release Format 2 (RF2). The US Edition of SNOMED CT is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International release of SNOMED CT.
- [SNOMED Clinical Terminology to ICD-10-CM Delta Map](https://www.johnsnowlabs.com/marketplace/snomed-clinical-terminology-to-icd-10-cm-delta-map)
- The purpose of the SNOMED CT to ICD-10-CM map is to support semi-automated generation of ICD-10-CM codes from clinical data encoded in SNOMED CT for reimbursement and statistical purposes.

**Data Engineering Overview**
**We deliver high-quality data**
- Each dataset goes through 3 levels of quality review
- 2 Manual reviews are done by domain experts
- Then, an automated set of 60+ validations enforces every datum matches metadata & defined constraints
- Data is normalized into one unified type system
- All dates, unites, codes, currencies look the same
- All null values are normalized to the same value
- All dataset and field names are SQL and Hive compliant
- Data and Metadata
- Data is available in both CSV and Apache Parquet format, optimized for high read performance on distributed Hadoop, Spark & MPP clusters
- Metadata is provided in the open Frictionless Data standard, and its every field is normalized & validated
- Data Updates
- Data updates support replace-on-update: outdated foreign keys are deprecated, not deleted

**Our data is curated and enriched by domain experts**

Each dataset is manually curated by our team of doctors, pharmacists, public health & medical billing experts:
- Field names, descriptions, and normalized values are chosen by people who actually understand their meaning
- Healthcare & life science experts add categories, search keywords, descriptions and more to each dataset
- Both manual and automated data enrichment supported for clinical codes, providers, drugs, and geo-locations
- The data is always kept up to date – even when the source requires manual effort to get updates
- Support for data subscribers is provided directly by the domain experts who curated the data sets
- Every data source’s license is manually verified to allow for royalty-free commercial use and redistribution.

**Need Help?**
If you have questions about our products, contact us at [[e-mail]](mailto:[e-mail]).