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VSAC Support Center

Code Systems and Tools

This table displays all of the available code systems currently supported by the Value Set Authority Center for the purpose of authoring and maintaining value sets. Currently, all available code systems are covered by the terms of the UMLS Metathesaurus® License Agreement, and all users of VSAC are required to obtain a UMLS License and abide by the terms of the license.

Learn more about VSAC code systems: CDCREC, CDT, CPT®, CVX, HCPCS, HSLOC, ICD-10-CM, ICD-10-PCS, ICD-9-CM, LOINC®, MED-RT, NCI, NDF-RT, Health Care Provider Taxonomy, RxNorm, SNOMED CT, SOP, UCUM, UMLS, and UNII

RxNorm: VSAC releases RxNorm version updates monthly on the third Monday of the month. For example, when RxNorm releases the monthly update on 11/07/2016, VSAC will provide this release in VSAC by the third Monday of November, 11/21/2016.

All other VSAC terminologies: In most cases, when a VSAC terminology publishes an updated version, barring any data issues or inconsistencies that require resolution with the source terminology, UMLS needs approximately 3 weeks to process the update into VSAC-consumable files. VSAC needs about 3 weeks processing time after receiving the UMLS-processed files. This is the time it takes VSAC to extract, transform, load, and perform quality assurance for the code system. Total time from source terminology update to VSAC publication, approximately six weeks.

Last Reviewed: May 2, 2022