CHIA Releases Monthly Monitoring of Massachusetts Enrollment: One Year Of Data

DATE : June 07, 2021

The Center for Health Information and Analysis (CHIA) has published an expanded version of its latest monthly enrollment data summaries by key market sector to provide more insight into the impact of COVID-19 on insurance coverage in the Commonwealth.

This release covers enrollment figures through March 2021, including a full calendar year of health insurance enrollment data following Governor Baker's state of emergency declaration.


Key Findings: 


  • Overall insurance coverage has remained fairly stable during the pandemic, with almost 6.5 million Massachusetts residents receiving coverage from private commercial plans, MassHealth, or Medicare.


  • Private commercial insurance plans, which cover approximately 3.9 million Massachusetts residents, declined by over 153,000 (-3.8%) between March 2020 and March 2021, in large part due to job losses that impacted employer-sponsored insurance (ESI) coverage.


    • The number of individuals with primary MassHealth coverage grew by approximately 190,000 (16.2%) during the past year, which was largely attributable to the Families First Coronavirus Response Act.

This monthly enrollment data summary through March 2021 includes a brief with data tables and technical notes, as well as a databook.


For past editions of CHIA's monthly enrollment reports and more information on CHIA's biannual reporting on enrollment trends please visit:


eBlast page ET Monthly Enrollment