Addiction and mental health treatment in Ontario, CA

3 programs in Ontario list on public profiles, of 1,630 in California. Listings as of 19 Sep 2026.

These are the programs whose listed address is in Ontario. A program in a nearby town may still be the right one, so look at the cities near Ontario below. Lists Medicaid or Lists Medicare means the program's public listing says it takes that coverage. It does not mean the program takes your plan or has openings. Confirm your plan with the program. findingrehab.io has not checked these listings. How listings work

All programs in California (1,630) Programs that list Medicaid in California (1,092) Programs that list Medicare in California (716) Programs that list private insurance in California (826)

Substance abuse
3
Mental health
1
Confirmed numbers
2

Programs in Ontario

3 programs match

Showing the first 24 programs, sorted by name. The full list by city is below.

Each phone number says where it came from. We have not called any of them, so confirm with the program.

Showing 3 of 3

What Ontario lists

Levels of care

Coverage listed

  • Medicaid (3)
  • Medicare (2)
  • TRICARE (1)
  • Private insurance (2)
  • Self pay or sliding fee (2)

2 of these 3 phone numbers were confirmed against a second source, such as the program's own website or a government directory. Each listing says where its number came from.

Not listed in Ontario

No program here lists these, so this is where the nearest one is.

  • Hospital inpatient: Upland, about 3 miles away
  • Day treatment (PHP): Upland, about 3 miles away
  • Intensive outpatient (IOP): Upland, about 3 miles away
  • Sober living: Pomona, about 6 miles away

Cities near Ontario

Distances are straight line estimates between the middle of each city's listings.

All programs in Ontario

Printed from findingrehab.io/california/ontario/. Listings as of 19 Sep 2026.