Ranked list
The 10 largest medical groups in Connecticut by HCPs
The same ranking for Connecticut medical groups.
Ranked listRefreshed monthly
The 10 largest medical groups in Massachusetts by HCPs
Massachusetts General Physicians Organization (MGPO) has the most HCPs of any medical group in Massachusetts, 6,747, followed by Massachusetts General Hospital in Boston (6,587) and Brigham and Women's Hospital in Boston (5,366).
- Massachusetts General Physicians Organization (MGPO)6,747HCPs4,510physicians
- Massachusetts General Hospital6,587HCPs4,416physicians
- Brigham and Women's Hospital5,366HCPs3,808physicians
- UMass Memorial Medical Group3,423HCPs2,058physicians
- Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP)3,206HCPs2,362physicians
- Steward Medical Group3,027HCPs1,990physicians
- Lahey Clinic2,218HCPs1,351physicians
- Baystate Medical Practices1,827HCPs1,091physicians
- Atrius Health1,624HCPs793physicians
- Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center1,539HCPs1,102physicians
The 10 highest of 2,293 Massachusetts medical groups that report HCPs. Ranks compare size, not quality of care.
Every medical group in MassachusettsThe median Massachusetts medical group has 6 HCPs
2,293 Massachusetts medical groups report HCPs. The median medical group has 6 HCPs, so Massachusetts General Physicians Organization (MGPO) is about 1,125 times that size.
- the size of the median Massachusetts medical group, which has 6 HCPs
- 1,125×
- of the 2,293 Massachusetts medical groups that report HCPs
- 0.4%
How we ranked the top Massachusetts medical groups
- Measure
- HCPs linked to each group in CMS enrollment and the Dmand AI database.
- 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 HCPs.
- Ties
- Medical groups with the same number share a rank.
- What a rank means
- Size only. A rank compares HCPs; 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 HCPs?
Massachusetts General Physicians Organization (MGPO) in Boston, with 6,747 HCPs. Massachusetts General Hospital is second with 6,587.
What are the top 10 Massachusetts medical groups by HCPs?
Massachusetts General Physicians Organization (MGPO) (6,747), Massachusetts General Hospital (6,587), Brigham and Women's Hospital (5,366), UMass Memorial Medical Group (3,423), Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP) (3,206), Steward Medical Group (3,027), Lahey Clinic (2,218), Baystate Medical Practices (1,827), Atrius Health (1,624), Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (1,539).
How many HCPs does a typical Massachusetts medical group have?
The median Massachusetts medical group that reports HCPs has 6 HCPs, 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.
More ranked lists
Every ranked listRanked list
The 10 largest hospitals in Massachusetts
Hospitals in Massachusetts ranked by staffed beds.
Dmand AI
Reach the buying committee at the 10 top Massachusetts medical groups
Pick a medical group from this list and see its leaders by department, with direct dials and email, in one login.
- 30 days free
- Self-serve
- No credit card