California law requires every health plan that covers hospital, medical, or surgical care to also cover applied behavior analysis for autism, with no dollar caps, no visit limits, and no age restrictions. ABA therapy in California is governed by Health and Safety Code Section 1374.73 (enacted through SB 946), by a three-tier structure defining who can deliver services, and by state and federal rules giving patients the right to appeal when coverage is denied. The framework applies whether you are a parent arranging therapy for a child, an adult pursuing treatment, or a provider working out compliance.
What Insurance Has to Cover
Senate Bill 946, codified at Health and Safety Code Section 1374.73, is the backbone of ABA coverage in California. Since July 1, 2012, every health care service plan contract covering hospital, medical, or surgical care must also cover behavioral health treatment for autism, including ABA and other evidence-based behavioral interventions that develop or restore functioning.1California Legislative Information. California Code Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage
To be covered, the treatment has to be prescribed by a licensed physician and surgeon or developed by a licensed psychologist, provided under a treatment plan created by a qualified autism service provider, and delivered by a provider, professional, or supervised paraprofessional. The treatment plan must include measurable goals over a specific timeline, and it must be reviewed at least every six months.1California Legislative Information. California Code Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage
No dollar caps. No visit limits. No age cutoff. Health plans also have to maintain adequate provider networks that include qualified autism service providers who supervise or employ the professionals and paraprofessionals doing the hands-on work.1California Legislative Information. California Code Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage
The 2026 Rediagnosis Protection
A change effective January 1, 2026 closes a gap families used to run into at renewal time. Health plans can no longer force an enrollee who was previously diagnosed with autism to be rediagnosed just to keep behavioral health treatment coverage. A treating provider may still reevaluate the patient, and a physician or psychologist may prescribe a rediagnosis at their own clinical discretion, but the insurer cannot demand one as a condition of continued coverage. The plan also cannot discontinue or delay existing treatment while any rediagnosis is pending.2California Legislative Information. California Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage
Who Can Legally Deliver ABA Therapy
California does not issue a standalone state license for behavior analysts. Instead, the Business and Professions Code and Health and Safety Code set up three tiers of practitioners, each with distinct qualifications and supervision rules.
A qualified autism service provider sits at the top. Under Business and Professions Code Section 4999.200, this person either holds a national certification accredited by the National Commission for Certifying Agencies (Board Certified Behavior Analyst certification from the BACB is the most common example) or is licensed in one of several health professions, including physician and surgeon, psychologist, marriage and family therapist, clinical social worker, professional clinical counselor, occupational therapist, physical therapist, speech-language pathologist, or audiologist.3California Legislative Information. California Code Business and Professions Code 4999.200 – Qualified Autism Service Provider The provider designs the treatment plan, supervises the rest of the team, and carries ultimate responsibility for the patient’s care.
A qualified autism service professional, defined in Business and Professions Code Section 4999.201, works under a provider’s supervision. The category includes behavioral service providers meeting the qualifications in Title 17 of the California Code of Regulations, along with associate-level licensees regulated by the Board of Behavioral Sciences or the Board of Psychology.4California Legislative Information. California Code Business and Professions Code 4999.201 – Qualified Autism Service Professional Professionals cannot independently design treatment plans or supervise paraprofessionals.
A qualified autism service paraprofessional is neither licensed nor nationally certified, and does most of the day-to-day session work. Each paraprofessional must be supervised at a level meeting professionally recognized standards, meet the education and training qualifications in Title 17, and be employed by or work under the direction of the provider responsible for the treatment plan.1California Legislative Information. California Code Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage If you receive ABA therapy, the person in the room during most sessions will usually be a paraprofessional, not the BCBA who designed the program. Many paraprofessionals also hold Registered Behavior Technician credentials from the BACB to satisfy the training piece.
Medi-Cal Coverage for Children Under 21
For families on Medi-Cal, ABA is available through the behavioral health treatment benefit. California’s Medi-Cal program covers ABA and other evidence-based behavioral intervention services, including behavioral-analytic assessment and development of treatment plans, for fee-for-service members under the age of 21.5California Department of Health Care Services. Medi-Cal Enrollment Requirements and Procedures for Qualified Autism Service Provider Organizations and Individuals This coverage comes out of the federal Early and Periodic Screening, Diagnostic, and Treatment requirement, which obligates state Medicaid programs to fund medically necessary services for children.
Federal Mental Health Parity
Federal law adds another layer. The Mental Health Parity and Addiction Equity Act of 2008 requires group health plans that offer both medical/surgical and mental health benefits to apply the same financial requirements and treatment limitations to both. In practice, a plan cannot impose higher copayments, stricter prior authorization, or tighter visit limits on ABA than on comparable medical and surgical care.6Office of the Law Revision Counsel. 29 USC 1185a – Parity in Mental Health and Substance Use Disorder Benefits
Parity reaches both quantitative limits, such as covered sessions per year, and non-quantitative limits, such as utilization review and medical necessity criteria. If a plan does not cap physical therapy visits, it generally cannot cap ABA visits either. This matters when a plan tries to restrict access through administrative hurdles it would never apply to a surgical benefit.
Your Rights During Treatment
Informed Consent
Before ABA begins, the patient or legal guardian must give informed consent. California regulations require providers to explain the reason for the proposed treatment, the nature and frequency of procedures, expected outcomes with and without treatment, significant risks and side effects, reasonable alternatives, and the right to refuse or revoke consent at any time.7Legal Information Institute. California Code of Regulations Title 22 72528 – Informed Consent Requirements Because treatment plans change and must be reviewed at least every six months, the consent conversation is an ongoing one.
Confidentiality
The California Confidentiality of Medical Information Act prohibits providers, health plans, and their contractors from disclosing a patient’s medical information without authorization. Session notes, behavioral assessments, and treatment plans cannot be shared with schools, employers, or family members without written consent. The law carves out narrow exceptions when disclosure is compelled by a court order, a licensing board investigation, a valid search warrant, or a medical examiner’s death investigation.8California Legislative Information. California Civil Code 56.10 – Disclosure of Medical Information by Providers
Qualified Practitioners
You are entitled to receive ABA from practitioners who meet the qualification standards for their tier. Every treatment plan must be designed and approved by a qualified autism service provider, and every paraprofessional has to be supervised at professionally recognized levels.1California Legislative Information. California Code Health and Safety Code 1374.73 – Behavioral Health Treatment Coverage If you suspect the person working with your child lacks the credentials or supervision the law requires, you can ask the provider organization for documentation and file a complaint with the Department of Managed Health Care.
Appealing a Coverage Denial
Denials for ABA happen regularly, usually on medical necessity grounds. California gives you two main avenues, and the timelines are strict.
Internal Appeal
Start with an internal appeal filed directly with your insurer. You have 180 days from the denial notice to submit it. Attach supporting documentation, including a letter from the prescribing physician or psychologist explaining why ABA is medically necessary for this particular patient. For a service you have not yet received, the plan must decide within 30 days. For services already received, the deadline is 60 days. In urgent situations where delay could seriously harm the patient, request an expedited appeal, which must be decided within four business days.9HealthCare.gov. Internal Appeals
Independent Medical Review
If the plan denies the internal appeal or fails to respond within 30 days, escalate to an Independent Medical Review through the California Department of Managed Health Care. The IMR is available to anyone enrolled in a health plan licensed under the Knox-Keene Act, which covers most managed care plans in the state. You must file the IMR application within six months of the plan’s response. The DMHC assigns the case to independent reviewers who were not involved in the original denial, and their decision binds the health plan.
For urgent cases, you can skip the internal appeal entirely and request an expedited IMR. A treating provider has to document in writing that the patient faces imminent harm without the requested service. If the DMHC agrees the situation is urgent, a decision can come within three days. The DMHC Help Center answers at 1-888-466-2219.
Telehealth Delivery
ABA delivered through telehealth has become common, and the rules have followed. Beginning January 1, 2026, federal Medicare rules allow a supervising practitioner’s presence for direct supervision to be virtual, which eases oversight of paraprofessionals and technicians working in a patient’s home.10Centers for Medicare & Medicaid Services. Telehealth FAQ For commercial plans and Medi-Cal, the same coverage requirements that apply to in-person ABA generally apply to telehealth, though the format fits parent training, treatment plan reviews, and supervision sessions better than it fits direct work with young children who need physical prompting. Confirm with your specific plan that telehealth sessions are covered on the same terms as in-person visits, and ask the provider how paraprofessionals in the home are being supervised.