Medicaid Statistical Information System (MSIS), the Medicaid Analytic eXtract (MAX)
Medicaid data are a set of de-identified person-level data files with information on Medicaid eligibility, service utilization, diagnoses, and payments. Derived from the Medicaid Statistical Information System (MSIS), the Medicaid Analytic eXtract (MAX) contain one person summary (PS) file and four claims files. Claims files include Inpatient (IP), Long-Term Care (LTC), Other Services (OT), and Prescription Drug (RX). These claims data include fee for service (FFS) claims as well as managed care encounter and premium payments. Owned by the Centers for Medicare and Medicaid (CMS), Medicaid data cover everyone enrolled in Medicaid and Children’s Health Insurance Program (CHIP) from all states and DC within a given year, totaling approximately 70 million people per year. MAX data can link to the Medicare Enrollment Database (EDB), First Data Bank (FDB), and other databases.
VEHSS plans to include Medicaid MAX data starting in 2019.