Analyzing Medicaid’s T-MSIS Data to Inform Behavioral Health, Disability, and Aging Policy

2021 – 2026

Project Overview


To lead rapid-response analyses on topics related to behavioral health, long-term services and supports, the COVID-19 pandemic, and other policy areas using Medicaid administrative data to drive data-driven decision making for ASPE’s Office of Behavioral Health, Disability, and Aging Policy.

Project Motivation

The Office of Behavioral Health, Disability, and Aging Policy sought a partner with expertise in Medicaid data to support its efforts to analyze behavioral health, aging, and disability policy trends and address the needs of vulnerable populations in the wake of the COVID-19 public health emergency. 

Prepared For

U.S. Department of Health and Human Services, Office of the Assistant Secretary for Planning and Evaluation

Mathematica applies its deep knowledge of Transformed Medicaid Statistical Information System (T-MSIS) data to design and conduct timely analyses that shed light on trends in behavioral health and long-term services and supports before, during, and after the COVID-19 pandemic.

The Office of the Assistant Secretary for Planning and Evaluation’s Office of Behavioral Health, Disability, and Aging Policy (BHDAP) develops, coordinates, researches, and evaluates U.S. Department of Health and Human Services programs and policies that promote the health of people living with disabilities, people with substance abuse and mental health disorders, and older adults. T-MSIS data, which provide the most current information on health care service use, enrollment, and spending for Medicaid and the Children’s Health Insurance Program (CHIP), is a critical source of information to drive data-driven program planning and decision making for BHDAP. 

This project makes use of Mathematica’s three decades of experience working with Medicaid data (including helping states improve the quality of their T-MSIS data submissions) and our subject matter expertise in behavioral health, opioid use, long-term services and supports, COVID-19, and other areas.

To date, Mathematica has analyzed topics including telehealth, home and community-based services (HCBS), and crisis services for BHDAP. A few examples include the following:

In addition to these analyses, Mathematica works closely with BHDAP to design studies and develop issue briefs and manuscripts. We also support BHDAP’s use of Medicaid data by providing technical assistance on T-MSIS data. Findings from this project have been published in the Maternal and Child Health Journal and Psychiatric Services.

Related Staff

Carol  Irvin

Carol Irvin

Senior Fellow

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Melissa Sanchez

Melissa Sanchez


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