Medical groups in Waltham, MA
- Medical groups
- 21
- Multi-specialty
- 3
- Single-specialty
- 18
- More than one site
- 12
There are 21 medical groups in Waltham with a Medicare PAC ID. Northeast Orthopaedic Alliance is the largest, with 58 Massachusetts physicians, followed by JJM Medical Services with 39. 76% of Waltham groups are independent.
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Northeast Orthopaedic Alliance is the largest medical group in Waltham, with 58 physicians
Ranked by physicians with a Massachusetts address linked to each group based in Waltham. JJM Medical Services is second with 39, and Boston Bone & Joint Institute third with 21.
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Sort and filter all 21 Waltham medical groups by specialty, parent organization, group size, EHR in use and decision makers in Dmand AI.
Showing 1 to 10 of 21 medical groups in Waltham
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
76% of Waltham medical groups are independent, with no larger parent organization
A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.
Waltham medical groups by ownership
- Independent16
- Platform or corporate owner4
- Other organization1
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 21 Waltham medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
5 Waltham medical groups practice at a hospital site
Beyond their own offices, groups practice at the sites of care linked to them in the org hierarchy. A group can practice at several kinds of site, so the shares overlap.
Waltham medical groups by site of care
- Hospitals5
- Ambulatory surgery centers3
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Primary care groups are the most common medical groups in Waltham, with 5
Each group is counted once, under its main specialty. Eye care groups are second, with 4, and 3 Waltham groups are multi-specialty.
- Primary care5
- Eye care4
- Anesthesia and pain3
- Rehabilitation and therapy3
- Behavioral and mental health2
- Orthopedics and sports medicine2
- Chiropractic1
- Podiatry1
Source: Dmand AI Professional Profile Data
414 Massachusetts HCPs work in Waltham medical groups, 138 of them physicians
Each clinician is counted once, across every Waltham group they are linked to. Only clinicians with a Massachusetts address are counted.
HCPs in Waltham medical groups by type
- Physicians (MD, DO)138
- Physician assistants92
- Nurses and nurse practitioners74
- Therapists (PT and OT)58
- Behavioral health clinicians23
- Other HCPs29
Source: Dmand AI Affiliation Data
Each Waltham medical group profile shows the parent, sites, clinicians and identifiers
- Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
- Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
- Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
- Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
- Parent organizationThe health system, platform or owner above the groupOn every profile
- Every clinician and siteThe full roster and every practice locationWith a free account
- Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
- EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account
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Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the Waltham medical group directory
| Data on this page | Source |
|---|---|
| Medical groups, specialties and sites | Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data |
| Parent organizations and independence | Dmand AI Org Hierarchy Data |
| Physicians and HCPs | Dmand AI Affiliation Data |
| Group NPI and PAC ID | NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS) |
Data last refreshed October 2026Report an inaccuracyRemove my information
The directory lists groups based in Waltham with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Waltham
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many medical groups are in Waltham?
There are 21 medical groups based in Waltham with a Medicare PAC ID: 3 multi-specialty and 18 single-specialty. 12 of them have more than one site.
What is the largest medical group in Waltham?
Northeast Orthopaedic Alliance, with 58 physicians and 134 HCPs with a Massachusetts address. JJM Medical Services is second with 39, and Boston Bone & Joint Institute is third with 21.
How many Waltham medical groups are independent?
16, or 76%, have no larger parent organization in the Dmand AI org hierarchy. 4 to a physician platform or corporate owner.
How many Waltham medical groups practice at a hospital?
5 Waltham groups practice at a hospital site linked to them in the Dmand AI org hierarchy.
How do I find a medical group's NPI or PAC ID?
Each medical group profile lists the group NPI and Medicare PAC ID at the top, with the main address and phone number. The NPI comes from the NPPES NPI Registry and the PAC ID from CMS Medicare enrollment.
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