Medical groups in Greenbrae, CA
- Medical groups
- 10
- Multi-specialty
- 2
- Single-specialty
- 8
- More than one site
- 5
There are 10 medical groups in Greenbrae with a Medicare PAC ID. Marin Hospitalist Medical Group is the largest, with 73 California physicians, followed by Anesthesiology Consultants of Marin with 35. 80% of Greenbrae groups are independent.
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Marin Hospitalist Medical Group is the largest medical group in Greenbrae, with 73 physicians
Ranked by physicians with a California address linked to each group based in Greenbrae. Anesthesiology Consultants of Marin is second with 35, and Marin Cancer Care third with 10.
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Sort and filter all 10 Greenbrae medical groups by specialty, parent organization, group size, EHR in use and decision makers in Dmand AI.
| # | Medical group | Parent organization | Physicians | HCPs | Decision makers |
|---|---|---|---|---|---|
| 1 | Marin Hospitalist Medical GroupGreenbrae · 7 sites | - | 73 | 77 | Decision makers |
| 2 | Anesthesiology Consultants of MarinGreenbrae · 2 sites | - | 35 | 35 | Decision makers |
| 3 | Marin Cancer CareGreenbrae · 1 site | Parent on file | 10 | 16 | Decision makers |
| 4 | Greenbrae DermatologyGreenbrae · 2 sites | - | 7 | 9 | Decision makers |
| 5 | Bay Area Eye SpecialistsGreenbrae · 1 site | - | 3 | 4 | Decision makers |
| 6 | Endoscopy Center of MarinGreenbrae · 4 sites | Parent on file | 2 | 32 | Decision makers |
| 7 | Asthma & Allergy Clinic of Marin & San Francisco, Inc.Greenbrae · 1 site | - | 2 | 3 | Decision makers |
| 8 | Marin Medical ConciergeGreenbrae · 1 site | - | 2 | 2 | Decision makers |
| 9 | La Follette OB-GYN & AestheticsGreenbrae · 2 sites | - | 1 | 3 | Decision makers |
| 10 | Nona Cunningham, M.D.Greenbrae · 1 site | - | 1 | 2 | Decision makers |
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
80% of Greenbrae 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.
Greenbrae medical groups by ownership
- Independent8
- Health system or hospital2
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 10 Greenbrae medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
4 Greenbrae 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.
Greenbrae medical groups by site of care
- Hospitals4
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Primary care groups are the most common medical groups in Greenbrae, with 3
Each group is counted once, under its main specialty. Anesthesia and pain groups are second, with 2, and 2 Greenbrae groups are multi-specialty.
- Primary care3
- Anesthesia and pain2
- OB/GYN and women's health2
- Dermatology1
- Eye care1
- Rheumatology, allergy and immunology1
Source: Dmand AI Professional Profile Data
183 California HCPs work in Greenbrae medical groups, 136 of them physicians
Each clinician is counted once, across every Greenbrae group they are linked to. Only clinicians with a California address are counted.
HCPs in Greenbrae medical groups by type
- Physicians (MD, DO)136
- Nurses and nurse practitioners32
- Non-clinical and support staff9
- Physician assistants2
- Acupuncturists and naturopaths1
- Other HCPs3
Source: Dmand AI Affiliation Data
Each Greenbrae 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 Greenbrae 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 Greenbrae with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Greenbrae
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 Greenbrae?
There are 10 medical groups based in Greenbrae with a Medicare PAC ID: 2 multi-specialty and 8 single-specialty. 5 of them have more than one site.
What is the largest medical group in Greenbrae?
Marin Hospitalist Medical Group, with 73 physicians and 77 HCPs with a California address. Anesthesiology Consultants of Marin is second with 35, and Marin Cancer Care is third with 10.
How many Greenbrae medical groups are independent?
8, or 80%, have no larger parent organization in the Dmand AI org hierarchy. 2 belong to a health system or hospital.
How many Greenbrae medical groups practice at a hospital?
4 Greenbrae 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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