CALIFORNIA
Rehab in San Mateo, California
53 verified treatment centers in and around San Mateo.
Northeast Health Services - Marlborough
Sigma Health Services
Northeast Health Services - Attleboro
Northeast Health Services - Worcester
Northeast Health Services - Milford
Northeast Health Services - Fall River
Palm Avenue Detox
Seneca Health Services Webster Springs
Seneca Health Services Summersville
Northeast Health Services - Quincy
Northeast Health Services - Sudbury
SSM Health Specialty Services - TMS Clinic
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Other cities within California
Finding treatment in San Mateo
If you are looking for addiction treatment in San Mateo, California, you are looking at 53 verified facilities in a major metro. The choices differ in clinical framework, payer mix, and approach — so the question that matters is less "what is close" and more "what is a real fit."
The California context
The state context you are navigating: expanded Medicaid in 2014 under the ACA. Overdose rate of 27.9 per 100,000. Primary substance patterns around fentanyl. Those state-level realities reach down to San Mateo's local facility mix and shape what is realistically available.
How access actually works in San Mateo
The practical first moves in San Mateo are the same as they would be elsewhere, just with local specifics: call your insurance plan's behavioral-health line and ask for a list of in-network facilities within 25 miles of San Mateo. Cross-reference that list with the SAMHSA federal locator to see what is currently operational. A primary-care doctor with knowledge of the local network is often the fastest path to a warm referral.
Regional and nearby options
For a major metro like San Mateo, the size of the local network means clinical specialty is usually available within San Mateo or immediately adjacent, without needing to widen the search radius substantially. Broadening the search radius even modestly — 30 to 50 miles — often doubles the available options, and the travel trade-off is worth considering when clinical specialty is a factor (dual-diagnosis programs, perinatal-SUD, adolescent programs are not always available in every major metro).
Practical next steps
What most San Mateo families do too fast: pick a facility before the clinical picture is clear. What works better: preliminary severity assessment, federal helpline review of general options, PCP conversation. The facility selection is the last step, not the first, and it works better when the first three have happened.
Last updated April 2026. Sources: SAMHSA Treatment Locator, CDC WONDER, KFF Medicaid Tracker, ASAM Criteria 4e. See our editorial policy.