Enrollment Trends
(Through September 2022)
Twice per year, CHIA updates its detailed Enrollment Trends analysis for the most recent two-year period to give researchers and policymakers insight into the market. The latest edition covers the period between September 2020 and September 2022 and includes breakouts by payers and product types in private commercial and public market sectors.
CHIA’s bi-annual Enrollment Trends reporting includes an interactive dashboard, a detailed databook, and technical appendix. For this reporting, coverage is defined by unique Massachusetts residents with primary, medical membership in the 12 largest commercial payers, MassHealth (Medicaid), or Medicare.
Enrollment measures are also reported in CHIA's Annual Report on the Performance of the Massachusetts Health Care System.
Updated March 2023
To provide more rapid insight into the impact of COVID-19 on insurance coverage in the Commonwealth, CHIA has produced monthly enrollment data summaries by key market sector. This report series is in addition to CHIA's regular biannual Enrollment Trends reports.
The latest publication includes summary enrollment figures through June 2021.
