Internists in Ontario, CA
- Internists
- 16
- Linked to a hospital or group
- 12
- Hospitals with an internist
- 3
- Medical groups with an internist
- 21
- Practice at a hospital
- 3
There are 16 internists in Ontario. San Bernardino County Behavioral Health has the most, 3, and Dignity Health - Marian Regional Medical Center has the most affiliated internists, 1. 70% finished medical school 30 or more years ago.
Find work emails and mobile numbers for all 16 Ontario internists
Validated work emails and mobile numbers for Ontario internists, found through healthcare waterfall enrichment, with a free Dmand AI account.
Ontario internists, listed A to Z by last name
Each internist on the list has internal medicine as their primary specialty and an Ontario practice address. The list shows the NPI, and how many hospitals and medical groups each one practices with. A free account names every hospital and group, with validated contacts.
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Sort and filter all 16 Ontario internists by hospital, medical group, the EHR they use and Medicare volume in Dmand AI.
The list shows the 13 internists with a public profile. The other 3 are counted in the total and searchable with a free account.
Sources: NPPES NPI Registry (CMS) and Dmand AI Affiliation Data
For health IT teams
Dmand AI has the EHR for 11 of 16 Ontario internists, at their hospital and their practice. Filter by Epic, Oracle Health, MEDITECH, athenahealth and more, then reach them with validated work emails and mobile numbers.
San Bernardino County Behavioral Health has the most internists in Ontario, with 3
Unicare Community Health Center is second with 3, and Moqattash Medical Group third with 2. Counts are internists with a California address linked to each group.
Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data
Dignity Health - Marian Regional Medical Center has the most affiliated internists in Ontario, with 1
Dignity Health - French Hospital Medical Center is second with 1, and Providence St. Mary Medical Center third with 1. Ontario internists are affiliated with 3 hospitals in all.
See every hospital and group for each Ontario internist
Each public profile names one place an internist practices. A free account shows all of them, with the employer, the EHR and validated contacts.
Source: Dmand AI Affiliation Data
Group practices and clinics are the most common site of care for Ontario internists, with 9
8 also practice at fqhcs, and 3 at hospitals. An internist can practice at several kinds of site, so the shares overlap.
Ontario internists by site of care
- Medical group practices9
- FQHCs8
- Hospitals3
Sources: Dmand AI Affiliation Data and Dmand AI Practice Data
70% of Ontario internists finished medical school 30 or more years ago
7 of the 10 Ontario internists with a graduation year on file. 0 graduated in the last 10 years, fewer than graduated 40 or more years ago.
Physicians by years since medical school
- Under 10 years ago0
- 10 to 19 years ago3
- 20 to 29 years ago0
- 30 to 39 years ago4
- 40 or more years ago3
Source: Dmand AI Professional Profile Data
Every Ontario internist profile shows current hospitals and groups, Medicare activity and NPI details
- Primary practiceThe main place they practice, with its type and cityOn every profile
- Every site of careEach hospital, clinic and group where they practice nowWith a free account
- EmployerThe organization they work for, when one is on fileWith a free account
- Medicare servicesServices and procedure codes billed to Medicare, from CMSOn every profile
- Medicare Part D prescribingClaims and drug costs from Part D, from CMSOn every profile
- Industry paymentsPayments from drug and device makers, from CMS Open PaymentsOn every profile
- Publications and clinical trialsResearch papers and trials linked to the NPI, when on fileOn every profile
- Licenses and graduation yearState license numbers and medical school graduation yearOn every profile
- NPI detailsNPI, enumeration date, primary taxonomy and practice addressOn every profile
- Work email and mobile numberFound on request through healthcare waterfall enrichment, then validatedWith a free account
- EHR in useThe EHR at each site where they practiceWith a free account
- Colleagues at each siteThe clinicians they work with at each hospital and groupWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: NPPES NPI Registry (CMS), Medicare Physician & Other Practitioners (CMS), Open Payments (CMS) and Dmand AI Affiliation Data
Sources for the Ontario internist directory
| Data on this page | Source |
|---|---|
| HCPs, types and specialties | NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data |
| Sites of care, hospitals and medical groups | Dmand AI Affiliation Data |
| Medical school graduation year | Dmand AI Professional Profile Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
Internists are HCPs whose primary specialty is internal medicine (taxonomy code 207R00000X), with an active NPI and an Ontario practice address.
FAQ
Frequently asked questions about internists in Ontario
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many internists are in Ontario?
16 internists have an active NPI, an Ontario practice address and internal medicine (taxonomy code 207R00000X) as their primary specialty. 12 of them are linked to a hospital or medical group.
Which Ontario medical groups have the most internists?
San Bernardino County Behavioral Health, with 3, followed by Unicare Community Health Center with 3 and Moqattash Medical Group with 2.
Which Ontario hospitals have the most internists?
Dignity Health - Marian Regional Medical Center, with 1 affiliated internists, followed by Dignity Health - French Hospital Medical Center with 1 and Providence St. Mary Medical Center with 1.
What share of Ontario internists practice at a hospital?
3 of the 12 Ontario internists with a mapped site of care, or 25%, have a current hospital affiliation.
What is the taxonomy code for internal medicine?
207R00000X is the NPPES taxonomy code for internal medicine. Sub-specialties with their own code are counted on their own lists.
Dmand AI
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