California · Opioid treatment programs
Methadone Clinics in Ontario, CA
Residents of Ontario, California have access to methadone treatment through 2 certified opioid treatment programs within 10 miles. The closest one is only 0.4 miles away, offering very convenient access in this city of about 175265 people. With two nearby options, comparing program hours, counseling services, and intake processes can help you choose. Certified programs provide methadone with medical supervision.
Clinics by distance from Ontario
Straight-line miles from the city center. Numbers match the list and cards below.
- Center
- Ontario city center (Census point)
- Rings
- Straight-line distance, not drive time
- Pins
- Programs, numbered nearest first
Treatment programs near Ontario
2 listed within 10 miles. Services and payment are shown only where confirmed.
-
1 0.4 miles
Certified opioid treatment program
Aegis Treatment Center
125 West F Street, Suite 101
Ontario, CA 91762- Methadone
- Buprenorphine
- Medicaid
- Medicare
- Sliding scale
- Cash / self-pay
-
2 5.8 miles
Certified opioid treatment program
Aegis Treatment Centers LLC
1050 North Garey Avenue
Pomona, CA 91767- Methadone
- Buprenorphine
- Medicaid
- Medicare
- Cash / self-pay
Not sure which program fits?
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At a glance
- programs within 10 mi
- 2
- to the nearest program
- 0.4 mi
- confirm Medicaid
- 2
- also offer buprenorphine
- 2
- people in Ontario
- 175,265
- county overdose deaths, 12 months to March 2026
- 434
What methadone treatment is
Effectiveness is the main reason methadone remains widely used. Long-term studies associate it with reduced illicit opioid use, lower overdose risk, reduced infectious disease transmission, and improved retention in treatment. Federal agencies include it among the recommended medications for opioid use disorder. People in Ontario considering treatment can discuss with a California licensed program whether this option fits their situation.
Your first visit
Intake at a methadone clinic involves several steps that cannot be rushed. During a first visit in Ontario, patients usually meet with a nurse or counselor, complete health questionnaires, and provide identification. A physician must often approve treatment before the first dose. Because of the required evaluations, new patients should plan to spend several hours at the clinic.
Paying for methadone in California
Before your first visit in Ontario, it is reasonable to ask how payment works. Medi-Cal covers methadone treatment for eligible California residents, and thanks to the state's Medicaid expansion, most adults with low incomes can enroll. Other insurers may also cover opioid treatment programs, though prior authorization is sometimes required. If you plan to pay without insurance, clinics can explain their fee structure. Knowing this information in advance makes the enrollment process smoother.
Take-home doses
Absence of recent diversion is one of the factors clinics weigh when deciding about take-home doses. Diversion means giving or selling medication to someone else. A record of regular attendance, no active substance use, and no serious behavioral problems also support approval. Each program applies federal guidelines in its own way.
Choosing a clinic
Take-home dosing follows a schedule set by federal regulations and the clinic's medical director. Patients who remain stable in treatment may gradually earn more take-home doses. Policies differ between clinics, so ask about the criteria used in Ontario.
Questions to ask a clinic
- How often do I need to visit the clinic?
- Is transportation assistance available for daily visits?
- How do you handle missed appointments or emergencies?
- What are your clinic hours each day?
- What happens if I miss a dose one day?
- Can I transfer my treatment from another clinic?
Methadone, buprenorphine and naltrexone compared
All three are FDA-approved medications for opioid use disorder. A clinician helps decide which fits.
| Medication | How it is taken | Where you get it | Daily clinic visits | Who prescribes |
|---|---|---|---|---|
| Methadone | Liquid, tablet or dissolvable wafer by mouth, once a day | Only at a certified opioid treatment program | Usually yes at first; federal rules allow take-home doses from early in treatment at the clinic's discretion | The program's medical staff, under federal treatment program rules |
| Buprenorphine | Film or tablet under the tongue daily, or a weekly or monthly injection | A pharmacy with a prescription, a doctor's office, or a treatment program | Usually no | Any clinician whose DEA registration covers Schedule III medications |
| Naltrexone | Monthly injection (extended-release) or a daily tablet | Injection at a clinic or doctor's office; tablets from a pharmacy | No; you must be off opioids for 7 to 10 days before starting | Any licensed prescriber |
Treatment in California
- certified programs listed in California
- 161
- of them confirm Medicaid
- 81%
Places with the most programs nearby
- San Fernando, CA16 programs
- Huntington Park, CA13 programs
- Alameda, CA11 programs
- Cypress, CA10 programs
- Palmdale, CA7 programs
Questions about methadone clinics near Ontario
How many methadone treatment programs are near Ontario, CA?
2 certified opioid treatment programs are listed within 10 miles of Ontario, CA; 2 confirm they offer methadone.
Which methadone clinic is closest to Ontario?
Aegis Treatment Center is the closest listed clinic, 0.4 miles from Ontario by straight-line distance.
Do methadone clinics near Ontario accept Medicaid?
2 listed clinics within 10 miles have confirmed Medicaid acceptance. Contact a clinic to check current coverage.
Do methadone clinics near Ontario also offer buprenorphine?
2 listed clinics within 10 miles have confirmed buprenorphine services.
Is there a methadone clinic in Ontario itself?
Yes. At least one clinic shown has a listed address in Ontario.