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.

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.

Evaluation of the Implementation of Section 1115 Medicaid Expansion Waivers
SHADAC was commissioned by the Medicaid and CHIP Payment and Access Commission (MACPAC) to conduct an analysis of how four states implemented Section 1115 Medicaid expansion waivers. SHADAC examined how these four states--Arkansas, Indiana, Iowa, and Michigan--approached the implementation of key provisions of their waivers, including exchange plan premium assistance, enrollee contribution requirements, health savings accounts, healthy behavior incentives, and graduated copayments for emergency department use.

Medicaid Quality Measurement for Special Populations
SHADAC conducted a comprehensive scan of state-level quality measurement initiatives related to home- and community-based services (HCBS) and behavioral health in Medicaid. SHADAC reviewed publicly available information on cutting-edge practices in quality measurement for these special populations and the status of measures currently in use in states. SHADAC prepared a synthesis of state measurement activity and challenges and recommendations for enhancing quality measurement in these areas. This work included a review of several of the core programs and documents relevant for this project (e.g., Federal Acquisition Institute [FAI] contracts, Managed Long-Term Services and Supports [MLTSS] reporting requirements, and measures related to assessing the quality of home- and community-based services).

SHADAC Expertise

Federal Survey Data Release Schedule

American Community Survey (ACS
An ongoing general household survey conducted by the U.S. Census Bureau that provides annual estimates of health insurance coverage at the national, state, and sub-state geographies. Note that due to impacts of COVID-19 on data collection efforts, sample size, and nonresponse bias, the Census Bureau did not release 2020 ACS as usual, but instead produced "experimental" 1-year estimates for 2020. 


October 20, 2022
• 2021 ACS 1-Year Public Use Microdata Sample (PUMS) file 

December 8, 2022
• 2017-2021 ACS 5-year data files

January 26, 2023
​• 2017-2021 5-Year Public Use Microdata Sample (PUMS) file 


September 15, 2022
• 2021 ACS 1-year data file (i.e., on

March 2022
• 5-Year (2016-2020) Data Release*

December 2021
• 1-Year 2020 Public Use Microdata Sample (PUMS) File with Experimental Weights

November 2021
• 2020 1-Year Experimental PUMS File released 
• 2020 1-Year Experimental Data Tables released 
• Experimental Weights Methodology Paper 

October 2021
• An Assessment of the COVID-19 Pandemic’s Impact on the 2020 ACS 1-Year Data Analytic Paper 

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


September 2021
• 2020 National Income, Poverty, and Health Insurance Statistics data release on Explore Census Data

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. View the Full MEPS Data Release Schedule via AHRQ.


July 2022
• 2021 MEPS-HC Health Insurance Tables 

December 2021
• 2020 MEPS-IC Health Insurance Tables – Private-Sector National Estimates
• 2020 MEPS-IC Health Insurance Tables – Private-Sector State and Metro Area 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. 


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


July 2022
• 2021 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 2021
2020 Annual Survey Data 
 *Only 2018 Annual Survey Data through currently available.

Note: Based on previous data release calendars. 
* Starting in 2019 U.S. Census Bureau American Community Survey (ACS) and Current Population Survey (CPS) data will no longer be available through American FactFinder, but will now be posted to their new "Explore Census Data" site.

For more information on these surveys see SHADAC's Brief Using Recent Revisions to Federal Surveys for Measuring the Effects of the Affordable Care Act. 

Page last updated August 2022