Enrollment in Health Insurance

Enrollment Trends
(march 2017 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), and Medicare. 

The March 2017 edition of Enrollment Trends offers insights into changes in health insurance coverage in Massachusetts from September 2014 through September 2016.

Key Findings from March 2017 Enrollment Trends:

  • Over four million Massachusetts residents received their primary, medical health insurance coverage through private commercial insurance from September 2014 through September 2016.

  • The number of Massachusetts residents enrolled in subsidized private commercial insurance (via ConnectorCare plans and Advance Premium Tax Credits) through the Massachusetts Health Connector increased by 40% from September 2015 through September 2016.

  • Enrollment in individual Qualified Health Plans through the Massachusetts Health Connector surpassed 225,000 members from September 2014 to September 2016—the highest level since the redesigned health insurance exchange opened in 2014.

commerical enrollment by payer feb 2017

The accompanying databook has additional dates and population breakouts 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

2016 Publications

July 2016

February 2016

2015 Publications

September 2015

  • Annual Report on the Performance of the Massachusetts Health Care System

    CHIA’s Annual Report includes an update on enrollment by payers, market sectors, and product types. See Page 24 of the report for more information.

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 Earlier reports (below) are provided for historical reference only.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