CMS Limited Data Set (LDS) Files Now Available Quarterly

CMS is pleased to announce that all researchers will be allowed to request LDS data on a quarterly basis in addition to the annual files. CMS is making more timely extracts of Medicare claims data available to researchers who access this data via Limited Data Sets (LDS). Historically, researchers have only been able to request annual extracts of Medicare data under the LDS request process. With the changes announced today, researchers will be able to request updates to their LDS claims files as frequently as quarterly, making it easier to do the important research that will lay the foundation for better quality and lower costs in the health care system.

For more information on this policy, please see the quarterly data FAQs or contact the Research Data Assistance Center (ResDAC) with any questions.