The Massachusetts Health Insurance Survey (MHIS) collects information on health insurance coverage and access to and use of health care for the non-institutionalized population in Massachusetts. It is funded by the Massachusetts Division of Health Care Finance and Policy (DHCFP) and is conducted by the Urban Institute, along with its subcontractor, Social Science Research Solutions (SSRS). This report provides information about the methods used to collect and analyze the MHIS.