Medical clinics · California

Medical clinics in Ontario, CA

118 medical clinics in Ontario with phone numbers, 26 with email addresses. Search the list, unlock the ones you want and start calling today.

Get the Ontario list freeSee a sample
118
businesses
100%
have a phone number
22%
have an email address (26)
—
average Google rating
Sample

A sample of medical clinics in Ontario

Twelve of the 118 medical clinics on the list. Phone numbers and emails unlock in the app — 1 credit per business, both together.

BusinessCategoryRatingWebsitePhoneEmail
Carefirst Medical GroupDoctor's Office; Medical Center—Yes(909) •••-••••Available
35 Dollar DOT Physical ExamChiropractor—Yes(909) •••-••••Available
ACT Family CounselingDoctor's Office—Yes(909) •••-••••Available
APRN WorldMedical Center—Yes(909) •••-••••Available
Sunshine PediatricsDoctor's Office—Yes(909) •••-••••Available
Arrowhead Aesthetic Plastic Surgery AssociatesDoctor's Office—Yes(909) •••-••••Available
Trinity Medical ClinicPhysician—Yes(909) •••-••••Available
Laser Eye Center OntarioMedical Center—Yes(909) •••-••••Available
Las Palmas Medical GroupFamily Medicine Doctor—Yes(909) •••-••••Available
United Chiropractic Health CenterChiropractor—Yes(909) •••-••••Available
P3 Healthcare SolutionsHealthcare Clinic; Medical Center; Other Healthcare Professional—Yes(844) •••-••••Available
Concentra Urgent CareMedical Center; Emergency Room; Hospital—Yes(909) •••-••••Available

Showing 12 of 118. Data refreshed October 2026.

The market

What Ontario's medical clinics look like

0% of rated medical clinics here hold 4.5★ or better — there is room for businesses that push for reviews.
0 carry a perfect 5.0★ rating; 118 have no rating yet — prime prospects for review and reputation services.
28 (24%) have no website listed — a ready-made list for web design and SEO offers.
30% link a Facebook or Instagram page from their listing.

Most common listings

  • Medical Center37
  • Doctor's Office33
  • Chiropractor19
  • Family Medicine Doctor4
  • Physician3
  • Doctor's Office; Medical Center2

Area codes

  • (909)107
  • (800)4
  • (951)2
  • (844)1
  • (888)1
  • (213)1
Playbook

How to sell to medical clinics in Ontario

Walk-in clinics, physiotherapy, chiropractic and specialty practices. Purchasing usually runs through a clinic manager, and anything touching patient data needs to meet privacy rules.

Who sells to medical clinics

  • Patient booking, reminders and intake software
  • Healthcare marketing agencies
  • Medical supply and equipment vendors
  • Staffing and locum agencies
  • IT, security and compliance services

What keeps owners up at night

  • Front-desk phone volume
  • No-shows and schedule gaps
  • Staffing
  • Privacy and compliance obligations
When to reach themMid-afternoon on weekdays, outside the morning rush. Ask for the clinic manager.
The angle that worksFront-desk load. Anything that cuts phone volume or no-shows without adding staff gets attention.
Reaching out in the USB2B cold email is governed by CAN-SPAM: honest headers and subject lines, a physical address and an opt-out you honor. Phone outreach has its own rules, especially for cell phones. Read our CAN-SPAM guide and cold-calling rules before you start.
FAQ

Questions about Ontario medical clinics leads

How many medical clinics in Ontario, CA are in the database?
118 medical clinics in Ontario, CA, as of October 2026. 118 of them have a phone number and 26 have an email address.
How much does it cost to get these leads?
Every account starts with 25 free credits. Unlocking a contact (phone and email together) costs 1 credit. The Starter plan is $39/month for 2,500 credits — about 1.6¢ a contact — so the whole Ontario list of 118 costs less than one month of Starter. See pricing.
Can I export the list to a dialer or CRM?
Yes. Unlocked contacts export to CSV, Excel or JSON with phone, email, website, address, category and rating, ready for any dialer or CRM.
Where does the data come from?
From public business listings — the same information medical clinics publish so customers can find them — cleaned, de-duplicated by phone number and refreshed regularly. Businesses can ask to be removed at any time.

Medical clinics in other cities

Los Angeles, CASan Diego, CAFresno, CALong Beach, CARiverside, CABakersfield, CAAnaheim, CASanta Ana, CAAll medical clinics →

Other businesses in Ontario

Construction companiesLaw firmsRestaurantsCafes and bakeriesSalons and spasAuto repair shopsCar dealershipsReal estate officesFinancial advisors and lendersConsultantsEverything in Ontario →

Start calling Ontario medical clinics today

25 free credits, no card. Search "medical clinics in Ontario" and unlock your first 25 contacts.

Get these leads freeSee pricing