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List of Serials Indexed for Online Users (LSIOU)
HealthData.Gov
Updated Oct 29, 2026
About this dataset
The List of Serials Indexed for Online Users (LSIOU) provides bibliographic information for all journals whose articles were ever indexed over time with the MeSH® vocabulary and cited in MEDLINE®, the backbone of the NLM PubMed® database. It includes titles that ceased publication, changed titles, or are no longer indexed. More detailed bibliographic data and information about indexing coverage for serials cited in MEDLINE/PubMed can be found in LocatorPlus Catalog®, the NLM online catalog, and the NLM Catalog, an Entrez database.
Data and resources (1)
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Download Data - List of Serials Indexed for Online Users (LSIOU)
The LSIOU is produced in XML. The current year's file is in the directory linked below and named lsi2021.xml (for 2021). Previous year's files are located in the 'archive' folder.
Modified Apr 29, 2026