Overview
CHIA’s aggregate payer data collects information from commercial health insurance plans in Massachusetts to support a better understanding of health care costs, spending trends, and how care is delivered across the state. The dataset includes more than 10 years of annual data from 18 commercial payers, representing most residents with private insurance, commercially managed Medicaid (MCO/ACO-A), and Medicare Advantage coverage.
Data submitted annually each fall includes insurance coverage and enrollment; premiums and member cost sharing; benefit design; and the relative prices paid to providers. Using this data, CHIA calculates key metrics including total health care expenditures (THCE); premium and member cost-sharing trends, primary care and behavioral health spending proportions, and statewide relative price (S-RP).
Submitting Data
CHIA works with commercial payers to collect this information each year. Detailed information for each data submission type can be found on the page linked below.
Recommended Links
CHIA Regulations (CMR)
Access CHIA's regulations governing health care data collection and reporting in Massachusetts, including current rules, administrative bulletins, and hearings.
Spending & Expenses
Explore analyses on health care spending, including trends in total medical expenses and primary care and behavioral health spending.
Commercial Premiums and Member Cost-Sharing
Annual data on health premiums is used to show costs for Massachusetts employers and workers and to track high-deductible plans and out-of-pocket costs.