Beneficiary Annual Summary File

The Beneficiary Annual Summary File is a beneficiary level file that contains enrollment, eligibility, vital statistics, summarized service utilization and payment, and CCW chronic condition flags. The last year of this file is calendar year 2010. This file has been incorporated into three of the the Master Beneficiary Summary file segments including, (1) the a/b/d segment, (2) the Chronic Conditions segment, and (3) the Cost & Utilization segment.

CY 1999 - 2010

The BASF is available for request up to the 2010 file, but the file will not be created for future years. The BASF information has been incorporated into the Master Beneficiary Summary File, Base (a/b/d), Chronic Conditions, and Cost & Utilization segments.

Data File Classification