Enrollment in Health Insurance

Enrollment Trends
(February 2019 Report)

Enrollment Trends monitors health insurance coverage in the Commonwealth of Massachusetts, where coverage is defined by unique Massachusetts residents with primary, medical membership in the 14 largest commercial payers, MassHealth (Medicaid), or Medicare.

The February 2019 edition of Enrollment Trends offers insights into changes in health insurance coverage in Massachusetts from September 2016 through September 2018.


Key Findings from the February 2019 Enrollment Trends

    • The total number of Massachusetts residents receiving their primary, medical health insurance coverage through private commercial insurance remained largely stable at 4.1 million members between September 2016 and September 2018.


    • In September 2018, MassHealth Accountable Care Organization (ACO) plan enrollment increased to 875,000, as Managed Care Organization (MCO) and Primary Care Clinician (PCC) plan membership continued to decline.


    • Unsubsidized Qualified Health Plan (QHP) enrollment decreased by 14.6% (-7,200 members) from September 2017 through September 2018, while subsidized QHP enrollment increased by 56.0% (+5,100 members) over the same time period.


Please note:

  • The accompanying databook has additional detail not included in the main report. The report is also accompanied by a technical appendix and MA APCD programming code.

  • Enrollment Trends is produced using the Massachusetts All-Payer Claims Database, supplemented with additional data from commercial payers, the Massachusetts Health Connector, and the Centers for Medicare and Medicaid Services.

Previous Enrollment Publication Materials

2018 Publications

August 2018


February 2018


2017 Publications

August 2017


March 2017


2016 Publications

July 2016


February 2016