Enrollment in Health Insurance

Enrollment Trends
(August 2018 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 13 largest commercial payers, MassHealth (Medicaid), or Medicare.

The August 2018 edition of Enrollment Trends offers insights into changes in health insurance coverage in Massachusetts from March 2016 through March 2018.


Key Findings from the August 2018 Enrollment Trends

    • Over four million Massachusetts residents received their primary, medical health insurance coverage through private commercial insurance between March 2016 and March 2018.


    • In March 2018, MassHealth shifted approximately two-thirds of its Managed Care Organization (MCO) and Primary Care Clinician (PCC) plan enrollees to Accountable Care Organization (ACO) plans.


    • Unsubsidized Qualified Health Plan (QHP) enrollment decreased by 14.4% (-7,000 members) from March 2017 to March 2018, while subsidized QHP enrollment increased by 55.0% (+5,000 members) over the same time period.


commercial enrollment by payer August 2018

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

February 2018

2017 Publications

August 2017


March 2017

2016 Publications

July 2016

February 2016

2015 Publications

September 2015

July 2015

March 2015


Please see the latest Enrollment Trends report for the most accurate data available. Enrollment data is subject to change due to retroactivity or continued specification refinement. Earlier reports (below) are provided for historical reference only.

2014 Publications