Ranked list
The 10 largest medical groups in Connecticut by practice locations
The same ranking for Connecticut medical groups.
Ranked listRefreshed monthly
The 10 largest medical groups in Massachusetts by practice locations
Massachusetts General Physicians Organization (MGPO) has the most practice locations of any medical group in Massachusetts, 296, followed by Steward Medical Group in Watertown (269) and Brigham and Women's Hospital in Boston (203). Together the 10 leaders hold 1,654 locations in seven cities.
- Massachusetts General Physicians Organization (MGPO)296locations4,510physicians
- Steward Medical Group269locations1,990physicians
- Brigham and Women's Hospital203locations3,808physicians
- UMass Memorial Medical Group166locations2,058physicians
- Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP)147locations2,362physicians
- Massachusetts General Hospital124locations4,416physicians
- Bay State Physical Therapy117locations3physicians
- Lahey Clinic116locations1,351physicians
- Northeast Health Services115locations25physicians
- Atrius Health101locations793physicians
The 10 highest of 2,293 Massachusetts medical groups that report practice locations. Ranks compare size, not quality of care.
Every medical group in MassachusettsThe 10 top Massachusetts medical groups hold 16% of all practice locations
2,293 Massachusetts medical groups report practice locations, 10,077 practice locations in all. The 10 on this list hold 1,654 of it. The median medical group has 2 locations, so Massachusetts General Physicians Organization (MGPO) is about 148 times that size.
- of all practice locations at Massachusetts medical groups that report them
- 16%
- the size of the median Massachusetts medical group, which has 2 locations
- 148×
- of the 2,293 Massachusetts medical groups that report practice locations
- 0.4%
How we ranked the top Massachusetts medical groups
- Measure
- Practice locations on file for each group.
- What counts as a group
- One Medicare PAC ID. A group that bills under several names counts once.
- Field
- 2,293 Massachusetts medical groups in the Dmand AI database report practice locations.
- Ties
- Medical groups with the same number share a rank.
- What a rank means
- Size only. A rank compares practice locations; it says nothing about quality of care.
- Refresh
- Monthly. Updated Oct 28, 2026.
FAQ
Questions about the top Massachusetts medical groups
Answers from the same data, updated monthly.
Which Massachusetts medical group has the most practice locations?
Massachusetts General Physicians Organization (MGPO) in Boston, with 296 locations. Steward Medical Group is second with 269.
What are the top 10 Massachusetts medical groups by practice locations?
Massachusetts General Physicians Organization (MGPO) (296), Steward Medical Group (269), Brigham and Women's Hospital (203), UMass Memorial Medical Group (166), Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP) (147), Massachusetts General Hospital (124), Bay State Physical Therapy (117), Lahey Clinic (116), Northeast Health Services (115), Atrius Health (101).
How many practice locations does a typical Massachusetts medical group have?
The median Massachusetts medical group that reports practice locations has 2 locations, out of 2,293 that report them.
How often is this list updated?
Every month, when the Dmand AI database refreshes. This version is from Oct 28, 2026.
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