Healthcare Insights
Largest IDNs in Massachusetts
Massachusetts is the 16th largest state in the U.S. by population, and its seven million residents rely on 128 hospitals and healthcare facilities, many of which are part of a broader integrated delivery network (IDN).
Knowing the largest IDNs in Massachusetts can help refine your healthcare commercialization strategy. For example, targeting large and financially strong health systems can support greater distribution of your product or service among their affiliated hospitals, ambulatory surgery centers, and imaging centers.
Using the Definitive Healthcare HospitalView product, we compiled a list of the largest IDNs in Massachusetts based on the number of affiliated hospitals. We also ranked the Massachusetts IDNs based on NPR to see which IDNs came out on top.
| Rank | Def ID | IDN name | City | # of hospitals | # of staffed beds | Explore dataset |
|---|---|---|---|---|---|---|
| 1 | 7001 | Mass General Brigham (FKA Partners HealthCare) | Boston | 16 | 3,389 | Explore |
| 2 | 992199 | Beth Israel Lahey Health | Cambridge | 14 | 2,431 | Explore |
| 3 | 7265 | Department of Veterans Affairs (AKA Veterans Health Administration) | Bedford | 9 | 1,455 | Explore |
| 4 | 274104 | UMass Memorial Health Care | Worcester | 9 | 1,205 | Explore |
| 5 | 7097 | Massachusetts Bureau of Public Health Facilities | Boston | 9 | 1,194 | Explore |
| 6 | 4700 | Baystate Health | Springfield | 5 | 1,031 | Explore |
| 7 | 780812 | Tufts Medicine (FKA Wellforce) | Burlington | 5 | 1,076 | Explore |
| 8 | 550045 | Southcoast Health System | New Bedford | 4 | 911 | Explore |
| 9 | 1058222 | Boston Medical Center Corporation | Boston | 4 | 923 | Explore |
| 10 | 7097 | Massachusetts Bureau of Public Health Facilities | Westfield | 4 | 733 | Explore |
Fig. 1 Data is from the Definitive Healthcare HospitalView product and the Medicare Cost Report and is displayed according to the most recent 12-month interval tracked in our database. Data accessed October 2025.
What Massachusetts IDN has the most affiliated hospitals?
The Massachusetts health system with the most hospitals is Mass General Brigham, with 16 hospitals. Five of their hospitals are nationally recognized by U.S. News & World Report as the best hospitals across the U.S.
The health system with the second most affiliated hospitals is Beth Israel Lahey Health, with 14 hospitals. These hospitals include teaching, community, and specialty hospitals and combined, have over 2,400 staffed beds.
The VA New England Healthcare System, UMass Memorial Health Care, and Massachusetts Bureau of Public Health Facilities are tied for the third-highest number of hospitals, with both IDNs having nine affiliated hospitals. When sub-ranked by number of staffed beds, the VA leads with over 200 more beds than the other two tied IDNs.
| Rank | Def ID | IDN name | City | Net patient revenue | # of staffed beds | Explore dataset |
|---|---|---|---|---|---|---|
| 1 | 7001 | Mass General Brigham (FKA Partners HealthCare) | Boston | $7,687,876,848 | 3,389 | Explore |
| 2 | 992199 | Beth Israel Lahey Health | Cambridge | $5,732,407,552 | 2,431 | Explore |
| 3 | 274104 | UMass Memorial Health Care | Worcester | $3,609,012,406 | 1,205 | Explore |
| 4 | 1058222 | Boston Medical Center Corporation | Boston | $2,096,481,152 | 923 | Explore |
| 5 | 1063190 | Boston Childrens Hospital Health System | Boston | $2,082,381,840 | 572 | Explore |
| 6 | 4700 | Baystate Health | Springfield | $1,944,258,368 | 1,031 | Explore |
| 7 | 780812 | Tufts Medicine (FKA Wellforce) | Burlington | $1,720,828,000 | 1,076 | Explore |
| 8 | 550045 | Southcoast Health System | New Bedford | $1,062,320,960 | 911 | Explore |
| 9 | 7189 | Cape Cod Healthcare | Hyannis | $878,020,064 | 320 | Explore |
| 10 | 1007508 | South Shore Health | South Weymouth | $815,413,312 | 394 | Explore |
Fig. 2 Data is from the Definitive Healthcare HospitalView product and the Medicare Cost Report and is displayed according to the most recent 12-month interval tracked in our database. Data accessed October 2025
What Massachusetts IDN has the highest net patient revenue (NPR)?
The IDN in Massachusetts with the highest net patient revenue is Mass General Brigham, with an NPR of $7.69 billion. They rank as one of the highest-earning IDNs in the U.S., based on Definitive Healthcare data. With over 3,300 staffed beds across its 16 hospitals, Mass General Brigham is also the largest IDN in Massachusetts and capable of caring for most patients.
The IDN with the second highest NPR in Massachusetts is Beth Israel Lahey Health, with an NPR of $5.73 billion. This IDN is also the second highest in terms of the number of hospitals, number of staffed beds, and number of discharges.
UMass Memorial Health Care has the third-highest net patient revenue in Massachusetts, with an NPR of $3.61 billion.
Targeting IDNs in Massachusetts
If you’re looking to sell into Massachusetts's healthcare industry, understanding the broader health system landscape is essential for making decisions. When you’re marketing a technology or service, knowing which Massachusetts IDNs have the most affiliated hospitals and the highest NPR can help with aligning sales territories or making strategic investment decisions.
Additionally, knowing which IDNs have the highest NPR can identify those in Massachusetts who have more room to expand their business, whether it’s to include a new specialty or add a new technology or software.
Still, while NPR can indicate the financial strength of an IDN, there are other metrics to consider for more targeted and effective sales conversations, such as integration level, affiliations, and referral sources.
Learn more
Healthcare Insights are developed with commercial intelligence from the Definitive Healthcare platform, where even more insights on Massachusetts’ healthcare system are available to uncover. Start a free trial now and access the latest healthcare data and analytics on hospitals, physicians, and other healthcare providers.
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