Medical groups in Portsmouth, NH
- Medical groups
- 34
- Multi-specialty
- 7
- Single-specialty
- 27
- More than one site
- 24
- 100+ physicians
- 1
There are 34 medical groups in Portsmouth with a Medicare PAC ID. Portsmouth Internal Medicine is the largest, with 108 New Hampshire physicians, followed by Optima Dermatology with 30. 71% of Portsmouth groups are independent.
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Portsmouth Internal Medicine is the largest medical group in Portsmouth, with 108 physicians
Ranked by physicians with a New Hampshire address linked to each group based in Portsmouth. Optima Dermatology is second with 30, and Northeast Rehab Physician Services third with 19. 1 Portsmouth group has 100 or more physicians.
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Sort and filter all 34 Portsmouth medical groups by specialty, parent organization, group size, EHR in use and decision makers in Dmand AI.
Showing 1 to 10 of 34 medical groups in Portsmouth
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
HCA Healthcare has the most physicians in Portsmouth medical groups, with 113 across 3 groups
Dmand AI maps every Portsmouth medical group to its parent organization, up to the health system or platform at the top. 2 parent organizations have two or more Portsmouth medical groups. Each clinician counts once per parent organization.
See every medical group, site and clinician under HCA Healthcare
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 34 Portsmouth medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
71% of Portsmouth 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.
Portsmouth medical groups by ownership
- Independent24
- Health system or hospital4
- Platform or corporate owner3
- Community or government1
- Other organization2
Source: Dmand AI Org Hierarchy Data
9 Portsmouth 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.
Portsmouth medical groups by site of care
- Hospitals9
- Therapy and rehab centers2
- Rural health clinics2
- Behavioral health facilities1
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Primary care groups are the most common medical groups in Portsmouth, with 6
Each group is counted once, under its main specialty. Behavioral and mental health groups are second, with 5, and 7 Portsmouth groups are multi-specialty.
- Primary care6
- Behavioral and mental health5
- Rehabilitation and therapy5
- Anesthesia and pain2
- Chiropractic2
- Eye care2
- Orthopedics and sports medicine2
- Podiatry2
- Radiology and imaging2
- Dermatology1
- ENT and audiology1
- OB/GYN and women's health1
- Pathology and laboratory1
- Rheumatology, allergy and immunology1
- General and specialty surgery1
Source: Dmand AI Professional Profile Data
807 New Hampshire HCPs work in Portsmouth medical groups, 267 of them physicians
Each clinician is counted once, across every Portsmouth group they are linked to. Only clinicians with a New Hampshire address are counted.
HCPs in Portsmouth medical groups by type
- Physicians (MD, DO)267
- Nurses and nurse practitioners208
- Physician assistants175
- Behavioral health clinicians80
- Therapists (PT and OT)40
- Other HCPs37
Source: Dmand AI Affiliation Data
Each Portsmouth 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 Portsmouth 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 Portsmouth with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Portsmouth
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 Portsmouth?
There are 34 medical groups based in Portsmouth with a Medicare PAC ID: 7 multi-specialty and 27 single-specialty. 24 of them have more than one site.
What is the largest medical group in Portsmouth?
Portsmouth Internal Medicine, with 108 physicians and 228 HCPs with a New Hampshire address. Optima Dermatology is second with 30, and Northeast Rehab Physician Services is third with 19.
Which health system has the most medical groups in Portsmouth?
By physicians, HCA Healthcare, with 113 across 3 groups, followed by Convenientmd with 16.
How many Portsmouth medical groups are independent?
24, or 71%, have no larger parent organization in the Dmand AI org hierarchy. 4 belong to a health system or hospital and 3 to a physician platform or corporate owner.
How many Portsmouth medical groups practice at a hospital?
9 Portsmouth 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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