Encrypted State Assigned Beneficiary Unique Identifier

This variable is contained in the following files:

Medicare-Medicaid Linked Enrollee Analytic Data Source (MMLEADS) 3.0 TAF Pharmacy File TAF Other Services File TAF Long Term Care File TAF Inpatient File

SAS Name

MSIS_ID

A state-assigned unique identification number used to identify a Medicaid/CHIP enrolled beneficiary and any claims submitted to the system. Also referred to as the Medicaid Statistical Information System Identifier (MSIS_ID).

Comments

The MSIS ID is unique only within a state for a year; a beneficiary’s MSIS ID may change longitudinally. Additional details are provided in the User Guide

https://www2.ccwdata.org/web/guest/user-documentation

This variable is encrypted in the CCW and may not be joined to any other data sets without CMS permission.

Source: T-MSIS Annual Demographic and Eligibility TAF

Alphanumeric character string, 32 characters
(Ex- 9Q81866B302C768A539BBE79FFB835FB)

Code	Code value
Null/missing	source value is missing or unknown