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Data Overview

The Blue Button database pulls data from the CMS Chronic Conditions Warehouse (CCW), which contains Medicare Part A, B and D claims data going back to 2014.

Definitions of Part A, B, and D claims data
Data typeDefinition
Medicare Part A claims data

Inpatient hospital stays, care in skilled nursing facilities, and hospice care

Medicare Part B claims data

Doctors’ services, outpatient care, preventive services, and durable medical equipment (DME)

Medicare Part D claims data

Prescription drugs prescribed by healthcare providers

Note: Blue Button API does not provide Medicare Part C claims (Medicare Advantage). However, if a Medicare Advantage enrollee has a Part D plan, the API includes those claims.

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