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Available CMS Data > Medicare > Data Documentation

Utilization and Enrollment Files

(Data Documentation is sometimes referred to as data dictionaries, record layouts, and data layouts)

ResDAC Disclosure Statement: This resource is for reference purposes only. Record layouts may vary, users should not use these layouts to develop programming language for specific data files. Please contact ResDAC with questions about the data files.

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Research Identifiable Files

Limited Data Set Files

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Research Identifiable Files

Inpatient, Skilled Nursing Facility, Outpatient, Home Health Agency, Hospice

• Medicare Institutional Files

Carrier [Old name: Physician/Supplier Part B], Durable Medical Equipment

• Medicare Non-Institutional Files

Medicare Denominator File

Medicare MedPAR File

Beneficiary Annual Summary File

Historical Record Layouts

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Limited Data Set (LDS) Files

Data Dictionaries (PDF)

• LDS Standard Analytical Files
  • Inpatient
  • Skilled Nursing Facility (SNF)
  • Outpatient
  • Home Health Agency (HHA)
  • Hospice
  • Carrier
  • Durable Medical Equipment (DME)
  
  
• MedPAR File: National, and SNF
• Long-Term Care Hospital (LTCH) PPS Expanded Modified MEDPAR
• End Stage Renal Disease Composite Rate Payment System File
• LDS Denominator File
• LDS Outpatient PPS
• LDS Outpatient PPS Partial Hospitalization Program
• LDS Inpatient Psychiatric PPS
• Health Outcomes Survey

Last Modified October 8, 2008