ABA Providers in California
Browse by county, which is the level that actually decides who can see you. Every listing comes from the public federal NPI registry.
1,536 agencies 45 counties with a registered provider Registry data from July 2026
Counties in California
Every county with at least one registered agency.
- Alameda County 67
- Butte County 3
- Calaveras County 1
- Contra Costa County 52
- Del Norte County 2
- El Dorado County 9
- Fresno County 26
- Humboldt County 9
- Imperial County 8
- Kern County 20
- Kings County 1
- Lassen County 1
- Los Angeles County 506
- Madera County 1
- Marin County 5
- Mendocino County 2
- Merced County 6
- Modoc County 3
- Mono County 1
- Monterey County 10
- Napa County 8
- Orange County 181
- Placer County 17
- Riverside County 79
- Sacramento County 66
- San Benito County 1
- San Bernardino County 95
- San Diego County 119
- San Francisco County 19
- San Joaquin County 17
- San Luis Obispo County 16
- San Mateo County 16
- Santa Barbara County 16
- Santa Clara County 53
- Santa Cruz County 8
- Shasta County 2
- Siskiyou County 1
- Solano County 13
- Sonoma County 7
- Stanislaus County 20
- Sutter County 2
- Tulare County 9
- Tuolumne County 1
- Ventura County 33
- Yolo County 4
How ABA coverage works in California
- Medicaid
- Medi-Cal. Under the federal EPSDT rule, Medicaid must cover medically necessary treatment for children under 21, which includes ABA where a clinician has documented the need. Prior authorization is normally required.
- Under age 3
- Start with Early Start, which runs under Part C of IDEA. It is separate from insurance, it is low or no cost, and you do not need a diagnosis to request an evaluation.
- Ages 3 and up
- Your school district handles educational services through an IEP under Part B of IDEA. That is separate from insurance-funded ABA, and many families use both at once.
- Commercial plans
- Every state requires state-regulated health plans to cover autism services, though the specifics differ. Your plan documents and the provider's intake team are the two reliable sources for what yours actually covers.
- The common exception
- Self-funded employer plans follow federal ERISA rules rather than state mandates, so a state requirement may not apply. Many cover ABA regardless. Ask HR whether your plan is self-funded or fully insured.
These are federal rules that apply in every state, plus the name of the state Medicaid program. We deliberately do not publish per-state hour caps or age limits here, because those change and stale numbers are worse than none.