The Centers for Medicare & Medicaid Services (CMS) has released 2012 Cost & Use research files from its Medicare Current Beneficiary Survey (MCBS). The MCBS Cost & Use files are a unique data resource, compiling survey and administrative data sources on Medicare covered and non-covered health care costs, utilization, and insurance coverage.
The Research, Statistics, Data & Systems page on the CMS website
contains a number of links to CMS statistical information. You will find
links to reports, publications, downloadable public use files, and
descriptions of data available.