SHADAC Expertise

Medicaid and CHIP Policy

SHADAC has worked both independently and under contract to the Robert Wood Johnson Foundation (RWJF) and the Medicaid and CHIP Payment Access Commission (MACPAC) to monitor and analyze changes in the Medicaid and CHIP policy landscape such as Medicaid expansion, eligibility, enrollment, and renewal, quality measurement, as well as states’ waiver application, implementation, and evaluation. SHADAC faculty and staff have exceptional knowledge of Medicaid and CHIP, including knowledge from the perspective of state policymakers and program administrators, as well as operational issues at the federal and state levels.

Related SHADAC work
Click on any title below to learn more about the project.

SHADAC Advocates a Data-based Approach to Advancing Medicaid and CHIP Access Monitoring Plan

On February 17, 2022, the Centers for Medicare & Medicaid Services (CMS) released a request for information (RFI) regarding access to coverage and care in Medicaid and the Children’s Health Insurance Program (CHIP).  SHADAC researchers focused our response on Objective 4: Question 1, which asked researchers to consider how CMS might develop a stronger Medicaid and CHIP access monitoring approach through data reporting and analysis. These comments are based on SHADAC’s experience providing data and evaluation technical assistance (TA) to states, and mirror recent testimony to the Medicaid and CHIP Payment Access Commission (MACPAC) provided by SHADAC’s Deputy Director.

Tracking the Data on Medicaid’s Continuous Coverage Unwinding (State Health & Value Strategies)

 A lack of publicly available data on Medicaid enrollment, renewal, and disenrollment makes it difficult to understand exactly who is losing Medicaid coverage and for what reasons. This issue brief lays out a phased set of priority measures and provides a model enrollment and retention dashboard template that states can use to monitor both the short-term impacts of phasing out public health emergency (PHE) protections and continuous coverage requirements, as well as longer-term enrollment and retention trends.

Assessment and Synthesis of Selected Medicaid Eligibility, Enrollment, and Renewal Processes and Systems in Six States

SHADAC worked as a contractor for the Medicaid and CHIP Payment Access Commission (MACPAC) to conduct an assessment of Medicaid eligibility, enrollment, and renewal processes and systems in six study states—Arizona, Colorado, Florida, Idaho, New York, and North Carolina. Utilizing a multi-case study methodology as well as key informant interviews with state and local agency staff and advocacy organizations, SHADAC collected and synthesized data on Medicaid enrollment processes and systems for individuals whose income eligibility is based on Modified Adjusted Gross Income (MAGI) in order to assess the extent to which states were achieving desired goals such as program efficiency and a simplified beneficiary experience. As a follow up, SHADAC identified the risks that remain for both individuals and state agencies that cause eligible individuals to remain uninsured or lose Medicaid coverage and conducted interviews with key stakeholders nationally and in four states to obtain additional input on potential risk points and strategies to improve eligibility determination and renewal accuracy.

Addressing Social Determinants of Health through Behavioral Health-focused 1115 Waivers: Implementation Lessons from Three States

Through the Robert Wood Johnson Foundation’s (RWJF) “Research in Transforming Health” program, SHADAC researchers conducted a study to understand how three states—Illinois, Texas, and Washington—were addressing the needs of justice-involved populations through implementation of Section 1115 Medicaid waiver programs. The specific aim of the study was to identify promising practices and lessons learned related to the development, implementation, and management of these innovative behavioral health policies with the purpose of informing policy development in states considering similar 1115 waivers.

SHADAC Expertise

Federal Survey Data Release Schedule

American Community Survey (ACS

An ongoing general household survey conducted by the U.S. Census Bureau provides annual estimates of health insurance coverage at the national, state, and sub-state geographies.  For a full range of available products from SHADAC’s coverage of the 2022 health insurance data release (2021 estimates) click here.

September 14, 2023
• 2022 ACS 1-year data file


January 2023
​• 2017-2021 5-Year Public Use Microdata Sample (PUMS) file

October 2022
• 2021 ACS 1-Year Public Use Microdata Sample (PUMS) file

September 2022
• 2021 ACS 1-year data file (i.e., on

Other Resources
• An Assessment of the COVID-19 Pandemic’s Impact on the 2020 ACS 1-Year Data Analytic Paper
• Introduction to the American Community Survey Public Use Microdata Sample (PUMS) file

Current Population Survey (CPS)

A monthly household survey conducted by the U.S. Census Bureau for the Bureau of Labor Statistics. Data on income and health insurance coverage is collected in its Annual Social and Economic Supplement administered in February through April. Annual health insurance estimates are provided for the nation and states. 


September 12, 2023
• 2022 Income, Poverty and Health Insurance statistics from the Current Population Survey Annual Social and Economic Supplement (CPS ASEC)


September 2022
• 2021 Income, Poverty and Health Insurance statistics from the Current Population Survey Annual Social and Economic Supplement (CPS ASEC)

Medical Expenditure Panel Survey (MEPS

MEPS is a two-component survey sponsored by the U.S. Department of Health and Human Services' Agency for Healthcare Research and Quality. The MEPS-Insurance Component (IC) is a survey of employers that provide data on employer-based health insurance. The MEPS-Household Component (HC) is a panel household survey that is supplemented with data from the respondents' medical providers.



July 2023
2022 MEPS-IC Private Sector Tables - National Estimates
• 2022 MEPS-IC Private Sector Tables - State Estimates
• 2022 MEPS-IC Private Sector Tables -Metro Estimates

National Health Interview Survey (NHIS)

A continuous cross-sectional household interview survey conducted by the National Center for Health Statistics (NCHS) which is part of the Centers for Disease Control and Prevention (CDC). It provides information on the health of the U.S. population and includes questions about health insurance coverage, health care utilization and access, and health conditions and behaviors, in addition to demographic and socioeconomic characteristics. 


Estimates for sub-annual time periods are released through the NHIS Early Release Program in September, November/December, and February/March each year.


June 2023
• 2022 NHIS Public Use Files

May 2022
• Health Insurance Coverage: Early Release of Estimates from the National Health Interview Survey, 2021

Behavioral Risk Factor Surveillance System (BRFSS)

A state-based survey sponsored by the Centers for Disease Control and Prevention that focuses on population health, risk factors, and health behaviors for the adult population. 


August 2023
2022 Annual Survey Data 

Household Pulse Survey

A near-real-time experimental survey from the U.S. Census Bureau. Typically released on a monthly basis.

Note: Based on previous data release calendars. 

Page last updated September 2023