Medical groups in Riverhead, NY
- Medical groups
- 21
- Multi-specialty
- 5
- Single-specialty
- 16
- More than one site
- 16
There are 21 medical groups in Riverhead with a Medicare PAC ID. Peconic Bay Medical Center is the largest, with 94 New York physicians, followed by Northwell Health Physician Partners Cardiology at Riverhead with 17. 90% of Riverhead groups are independent.
Find the decision makers at all 21 Riverhead medical groups
Work emails and mobile numbers for practice owners, administrators and physician leaders, found through healthcare waterfall enrichment, with a free Dmand AI account.
Peconic Bay Medical Center is the largest medical group in Riverhead, with 94 physicians
Ranked by physicians with a New York address linked to each group based in Riverhead. Northwell Health Physician Partners Cardiology at Riverhead is second with 17, and East End Gastroenterology & Hepatology third with 11.
Filter this list with a free account
Sort and filter all 21 Riverhead 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 Riverhead
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
Northwell Health has the most physicians in Riverhead medical groups, with 111 across 2 groups
Dmand AI maps every Riverhead medical group to its parent organization, up to the health system or platform at the top. 1 parent organizations have two or more Riverhead medical groups. Each clinician counts once per parent organization.
See every medical group, site and clinician under Northwell Health
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
For sales teams
Dmand AI maps the owners, administrators and physician leaders at each of the 21 Riverhead medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
90% of Riverhead 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.
Riverhead medical groups by ownership
- Independent19
- Health system or hospital2
Source: Dmand AI Org Hierarchy Data
2 Riverhead 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.
Riverhead medical groups by site of care
- Therapy and rehab centers2
- Hospitals2
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Eye care groups are the most common medical groups in Riverhead, with 6
Each group is counted once, under its main specialty. Primary care groups are second, with 5, and 5 Riverhead groups are multi-specialty.
- Eye care6
- Primary care5
- Rehabilitation and therapy3
- Behavioral and mental health2
- Chiropractic2
- Anesthesia and pain1
- ENT and audiology1
- Pathology and laboratory1
Source: Dmand AI Professional Profile Data
363 New York HCPs work in Riverhead medical groups, 141 of them physicians
Each clinician is counted once, across every Riverhead group they are linked to. Only clinicians with a New York address are counted.
HCPs in Riverhead medical groups by type
- Physicians (MD, DO)141
- Physician assistants61
- Nurses and nurse practitioners59
- Behavioral health clinicians23
- Optometrists and opticians23
- Other HCPs56
Source: Dmand AI Affiliation Data
Each Riverhead 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
Free account: 30 days free, self-serve, no credit card.
Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the Riverhead 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 Riverhead with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Riverhead
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 Riverhead?
There are 21 medical groups based in Riverhead with a Medicare PAC ID: 5 multi-specialty and 16 single-specialty. 16 of them have more than one site.
What is the largest medical group in Riverhead?
Peconic Bay Medical Center, with 94 physicians and 175 HCPs with a New York address. Northwell Health Physician Partners Cardiology at Riverhead is second with 17, and East End Gastroenterology & Hepatology is third with 11.
How many Riverhead medical groups are independent?
19, or 90%, have no larger parent organization in the Dmand AI org hierarchy. 2 belong to a health system or hospital.
How many Riverhead medical groups practice at a hospital?
2 Riverhead 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.
Dmand AI
Find the right contacts at every Riverhead medical group
Search 21 groups by specialty, size and parent organization, with the physicians and leaders at each one.
- 30 days free
- Self-serve
- No credit card