Massachusetts Health Care
Delivery System Map

Physician Networks and Major Medical Groups

Within major medical groups, 84% of Massachusetts’ primary care physicians are in the state’s 8 largest physician networks and 5 largest medical groups

Note: Data on provider networks and medical groups is derived from Massachusetts Health Quality Partners’ Massachusetts Provider Database. Approximately three quarters of all primary care physicians in Massachusetts are associated with a major medical group. The remaining physicians are either in very small practices or are licensed but not practicing. For additional information about the data used in this tool, please visit the about this site section.