Healthcare professionals in Ontario, CA
- Healthcare professionals
- 4,621
- Physicians (MD, DO)
- 117
- Nurses and NPs
- 189
- Physician assistants
- 35
- Behavioral health clinicians
- 3,196
There are 117 physicians among 4,621 healthcare professionals in Ontario. Kindred Hospital Ontario has the most affiliated doctors, 15, and family medicine is the most common physician specialty.
Find work emails and mobile numbers for 4,621 Ontario HCPs
Validated work emails and mobile numbers for Ontario physicians, nurses and every other HCP type, found through healthcare waterfall enrichment, with a free Dmand AI account.
There are 117 physicians (MD and DO) among 4,621 healthcare professionals in Ontario, CA
Counting every HCP with an active NPI and an Ontario practice address. Behavioral health clinicians are the largest group, with 3,196, and home and community care workers second, with 225.
Ontario HCPs by type
- Behavioral health clinicians3,196
- Home and community care workers225
- Non-clinical and support staff193
- Nurses and nurse practitioners189
- Speech therapists and audiologists174
- Dentists and dental staff135
- Physicians (MD, DO)117
- Pharmacists93
- Therapists (PT and OT)78
- Athletic trainers55
- Other HCPs166
Sources: NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data
Family medicine is the most common physician specialty in Ontario, with 31 physicians
Internal medicine is second, with 16, and pediatrics third, with 14. Each physician is counted once, under the primary specialty on their NPI record.
- Family medicine31
- Internal medicine16
- Pediatrics14
- Psychiatry7
- General practice6
- Obstetrics and gynecology7
- Diagnostic radiology5
- Anesthesiology4
Sources: NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data
Kindred Hospital Ontario has the most affiliated doctors in Ontario, with 15
Physicians are counted at each hospital where they have a current affiliation, wherever they live.
| # | Hospital | Health system | Physicians | HCPs |
|---|---|---|---|---|
| 1 | Kindred Hospital OntarioOntario | ScionHealth | 15 | 17 |
Source: Dmand AI Affiliation Data
Unicare Community Health Center has the most doctors of any Ontario medical group, with 53
Physicians of Southern California is second with 10 physicians, and Wound Healing Care Specialists third with 9. Counts are physicians and HCPs with a California address.
Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data
For health IT teams
Dmand AI has the EHR for 671 of 4,621 Ontario HCPs, 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.
Group practices and clinics are the most common site of care for Ontario healthcare professionals, with 196
FQHCs are second, with 129. A clinician can practice at several kinds of site, so the shares overlap. Pharmacies are left out.
Ontario HCPs by site of care
- Group practices and clinics196
- FQHCs129
- Hospitals50
- Physician offices43
- Urgent care centers18
- Therapy and rehab centers16
- Ambulatory surgery centers13
- Home health agencies9
- Skilled nursing facilities9
- Clinical labs6
See every site where Ontario HCPs practice
Each public profile names one place an HCP practices. A free account shows every current hospital, clinic and medical group, the employer and validated contacts for all 4,621.
Sources: Dmand AI Affiliation Data and Dmand AI Practice Data
45% of Ontario physicians finished medical school 30 or more years ago
29 of the 64 Ontario physicians with a graduation year on file. 10 graduated in the last 10 years.
Physicians by years since medical school
- Under 10 years ago10
- 10 to 19 years ago17
- 20 to 29 years ago8
- 30 to 39 years ago12
- 40 or more years ago17
Source: Dmand AI Professional Profile Data
Every Ontario HCP profile shows where they practice now, their Medicare activity and their 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 HCP 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
The directory counts HCPs with an active individual NPI, a name and an Ontario practice address.
FAQ
Frequently asked questions about doctors and healthcare professionals 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 doctors are in Ontario?
117 physicians (MDs and DOs) have an active NPI and an Ontario practice address, among 4,621 Ontario healthcare professionals.
What are the most common physician specialties in Ontario?
By primary specialty: family medicine (31), internal medicine (16), pediatrics (14), psychiatry (7), general practice (6).
Which medical groups have the most Ontario doctors?
Unicare Community Health Center (53 physicians), Physicians of Southern California (10 physicians) and Wound Healing Care Specialists (9 physicians). Counts are physicians with a California address.
How many Ontario physicians finished medical school 30 or more years ago?
29 of the 64 with a graduation year on file, or 45%. 10 graduated in the last 10 years.
How can I contact healthcare professionals in Ontario?
Dmand AI finds validated work emails, mobile numbers and practice phone numbers for healthcare professionals in Ontario through healthcare waterfall enrichment, matched to the site where each one practices now. They are available with a free Dmand AI account: 30 days free, self-serve, no credit card.
Dmand AI
Find the right contacts among Ontario healthcare professionals
Search 4,621 Ontario HCPs by specialty, hospital, group and city, with validated work emails and mobile numbers.
- 30 days free
- Self-serve
- No credit card