Check back here for the latest information on Medicare and Medicaid data for health services research.

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New Limited Data Set (LDS) File Available through CMS:

Ambulatory Surgical Center (ASC) Payment System

This file contains a summary of service utilization by ASC supplier and is derived from 2007 ASC line item level data, updated through March 2008, that is, line items for services furnished on or after January 1, 2007 through December 31, 2007 that were received, processed, paid, and passed to the National Claims History file by March 31, 2008.

This file does not contain data elements such as diagnosis codes, bill type, outlier payments, and service revenue payments that might permit identification of beneficiaries.

ATTENTION: Part D Potential Data Users

The Medicare Part D data final regulation was published May 28 and is effective June 27. Part D data for 2006 is expected to be available for release to researchers by December 2008. During this interim period, CMS is interested in hearing from the research community about additional data files that would be useful for Medicare Part D researchers. These suggestions include supplemental variables for appending to the Part D data, non identifiable data files, and programmatic summary statistics. Please submit to ResDAC via email your suggestion of the file or supplemental variables with a description of how it would be useful for your research project. ResDAC will compile the information for CMS consideration.

CMS Guide to Requests for Medicare Part D Prescription Drug Event (PDE) Data

Medicare Part D data final regulation

CMS Part D Claims Data

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What's New - Archived Info

(still important, but not "breaking news" anymore)

Proposed regulations (NPRM) on access to Medicare part D data

Beneficiary Annual Summary File

CMS Medicaid Research File Home Page

CMS Name & Address File policy change