Our Master Beneficiary Summary File (MBSF) - Chronic Conditions files summarize the payments for and services rendered to individuals enrolled in Medicare.
The table below lists variable categories for and some key variables in MBSF - Cost & Utilization data. For a comprehensive list of variables, review the MBSF - Cost & Utilization data dictionary.
Beneficiary Identification Number
Part B Drug Events, Part B Physician Events, Part D Event Count, Part D Standardized Fill Count
Eligibility & Enrollment
Enrollment Source, Reference Year
Acute Inpatient Hospital Payments, Ambulatory Surgery Center Payments, Anesthesia Payments, Dialysis Payments, Durable Medical Equipment Payments, Home Health Payments, Hospice Payments, Hospital Outpatient Payments, Imaging Payments, Other Inpatient Hospital Payments, Part B Drug Payments, Part B Physician Payments, Part D Payments, Part D Total Prescription Costs, Skilled Nursing Facility Payments
Stays, Visits, and Events
Acute Inpatient Stays, Ambulatory Surgery Center Events, Anesthesia Events, Dialysis Events, Durable Medical Equipment Events, Home Health Visits, Hospice Stays, Hospital Outpatient Visits, Hospital Outpatient Emergency Room Visits, Imaging Events, Inpatient Emergency Room Visits, Other Inpatient Stays, Skilled Nursing Facility Stays
1999 - 2020
File Update Frequency
Data Dictionary LinkVisit the Data Documentation Page
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