of information Electronic recording in a common way reduces errors and can help to ensure completeness in recording all relevant data Standardised information makes analysis easier, supporting quality, cost effective practice, research and future clinical guideline development A clinical terminology allows a health care provider to identify patients based on specified coded information, and more effectively manage screening, treatment and follow up Use cases More specifically, the following sample computer applications use SNOMED CT: Electronic Health Record Systems Computerized Provider Order Entry CPOE such as E-Prescribing or Laboratory Order Entry Catalogues of clinical services; e.g., for Diagnostic Imaging procedures Knowledge databases used in clinical decision support systems (CDSS) Remote Intensive Care Unit Monitoring Laboratory Reporting Emergency Room Charting Cancer Reporting Genetic Databases Access SNOMED CT is maintained and distributed by SNOMED International, an international non-profit standards development organization, located in London, UK.. The use of SNOMED CT in production systems requires a license. There are two types of license: Country/territory membership in SNOMED International (charged according to gross national product). Affiliate license (dependent on the number of end users). LDCs (least developed countries) can use SNOMED CT without charges. For scientific research in medical informatics, for demonstrations or evaluation purposes SNOMED CT sources can be freely downloaded and used. The original SNOMED CT sources in tabular form are accessible by registered users of the Unified Medical Language System (UMLS) who have signed an agreement. Numerous online and offline browsers are available. Those wishing to obtain a license for its use and to download SNOMED CT should contact their National Release Centre, links to which are provided on the IHTSDO website. License free subsets To facilitate adoption of SNOMED CT and use of SNOMED CT in other standards, there are license free subsets. For example, a set of 7 314 codes and descriptions is free for use by users of DICOM-compliant software (without restriction to IHTSDO member countries). Global Patient Set (GPS) subset GPS was released in Sep 2019 and contains 21 782 concepts. Top level concepts SNOMED CT concepts typically belong to a single hierarchy (with the exception of drug-device combined concepts). Some hierarchies, have a concept model defined (e.g., clinical findings). For other domains (e.g., Organism, Substance, Qualifier value), there is no concept model yet defined. Procedure Concept in this hierarchy represent procedures performed on a patient. There is a well established defined concept model for procedures. Procedure site