Dual or Medicaid only enrollee

Updated research request forms and data security approval requirement effective 4/24/23

This variable is contained in the following files:

Medicaid Enrollee Supplemental File (MESF): National Death Index (NDI) Segment Medicaid Enrollee Supplemental File (MESF): Conditions Segment

SAS Name

DM_SOURCE

This field specifies whether enrollee was dually enrolled in Medicare & Medicaid during the year, or enrolled only in Medicaid. CCW attempted to link each person in MAX PS to the Medicare enrollment data. Those with a match are classified as dually enrolled.

Code	Code value
D	person was dually enrolled
M	person was Medicaid only (not dual)