Is it called ABA in California?

Not in the benefit. Medi-Cal covers this as Behavioral Health Treatment (BHT), and that is the term used in policy, prior authorization and provider enrolment. Searching Medi-Cal documentation for "ABA" will miss most of what governs your claims — search for BHT instead.

Who is covered, and does a diagnosis of autism matter?

Medi-Cal covers all medically necessary BHT for eligible members under 21. That includes children with autism spectrum disorder, and also children for whom a physician or psychologist determines BHT is medically necessary regardless of diagnosis. The medical-necessity determination, not the diagnosis code alone, is what establishes coverage.

Who can deliver BHT under Medi-Cal?

A Qualified Autism Service (QAS) provider — someone certified by a national body such as the Behavior Analyst Certification Board, or licensed in a listed profession including physician and surgeon, psychologist, marriage and family therapist, clinical social worker, professional clinical counsellor, occupational therapist, physical therapist or speech-language pathologist.

Do I bill Medi-Cal directly, or go through a Regional Center?

Both routes now exist, and this changed recently. Since 1 July 2025, children with fee-for-service Medi-Cal may receive BHT from an enrolled Medi-Cal QAS provider rather than only through their local Regional Center. Which route applies depends on whether the member is in fee-for-service or a managed care plan, so confirm per member.

Does EVV apply to BHT in California?

Generally not, and this is worth getting right rather than assuming. California implemented EVV for Personal Care Services from 1 January 2022 and Home Health Care Services from 1 January 2023. BHT is neither category, so it does not ordinarily fall under CalEVV. If you also deliver PCS or HHCS, those visits do — through CalEVV or an Alternate EVV system that forwards data to the state aggregator, which Sandata operates.

Built by operators who ran ABA practices.

All-in-one ABA software for California practices.

Q: Does Wilma support Medi-Cal billing?

Yes. Wilma bills the ABA-specific CPT® and HCPCS codes California plans use, applies California’s payer modifier rules per claim, tracks authorization units, and submits through a built-in EDI clearinghouse with ERA posting. Insurance is captured at intake and kept on the client record. Wilma applies California’s billing rules; it does not run payer eligibility checks.

Q: How much does ABA software cost in California?

Wilma is a flat $30/user/month for the full platform — the same published price everywhere, with no per-client fees and no California-specific surcharge. Core has a 10-licence minimum, so accounts start at $300/month. Optional add-ons: AI (+$20/user/month) for note drafting and claim scrubbing, and Phone (+$10/user/month) for a shared practice line. Annual prepay saves about 17%.

Q: Is Wilma a fit for a solo BCBA in California?

No. Wilma has a 10-licence minimum, so Core starts at $300/month — it is built for a practice running a team, not for a single practitioner. In ABA your RBTs are users too, so a real agency is usually 1 BCBA + 4-8 RBTs + a biller and passes 10 people quickly; if you are there or close, Wilma fits and you will not replatform as you grow. If you are genuinely a one-person practice today, a lighter tool will serve you better until you start hiring. Small practices in California typically go live in under a week, with migration included.

Q: Does Wilma work for multi-site California practices?

Yes. Multi-entity billing with NPI, tax ID, and billing address per location, plus SSO and role-based access at scale — all on one data model. You can run several California locations without replatforming as you grow.

Medi-Cal billing, native EVV, real-time data collection, and session notes — every workflow on one record. From $300/month — $30/user/month, 10-licence minimum. Live in 1–2 weeks.

built for California practices
EVV + Medicaid rule packs: Native
per user / month, flat: $30
weeks to go live: 1–2

The short answer

How do you bill Medi-Cal for ABA in California?

California covers ABA under Medi-Cal, administered by the California Department of Health Care Services (DHCS), governed by the Medi-Cal Behavioral Health Treatment (BHT) benefit. Services are directed by a licensed Behavior Analyst, prior authorization is required with benefit-year limits, and where the service falls under Electronic Visit Verification the visit data must reach the state aggregator before the claim will pay.

Verified against Medi-Cal, administered by the California Department of Health Care Services (DHCS) primary sources on 2026-09-08. State rules change — check the sources below before relying on any of it for a claim.

ABA Medicaid billing in California: the rules that actually bite

The CPT codes are national. Everything wrapped around them — who may deliver the service, what has to be authorised first, and whether the visit needs verifying electronically — is set by Medi-Cal. This is what California requires.

Is it called ABA in California?: Not in the benefit. Medi-Cal covers this as Behavioral Health Treatment (BHT), and that is the term used in policy, prior authorization and provider enrolment. Searching Medi-Cal documentation for "ABA" will miss most of what governs your claims — search for BHT instead.
Who is covered, and does a diagnosis of autism matter?: Medi-Cal covers all medically necessary BHT for eligible members under 21. That includes children with autism spectrum disorder, and also children for whom a physician or psychologist determines BHT is medically necessary regardless of diagnosis. The medical-necessity determination, not the diagnosis code alone, is what establishes coverage.
Who can deliver BHT under Medi-Cal?: A Qualified Autism Service (QAS) provider — someone certified by a national body such as the Behavior Analyst Certification Board, or licensed in a listed profession including physician and surgeon, psychologist, marriage and family therapist, clinical social worker, professional clinical counsellor, occupational therapist, physical therapist or speech-language pathologist.
Do I bill Medi-Cal directly, or go through a Regional Center?: Both routes now exist, and this changed recently. Since 1 July 2025, children with fee-for-service Medi-Cal may receive BHT from an enrolled Medi-Cal QAS provider rather than only through their local Regional Center. Which route applies depends on whether the member is in fee-for-service or a managed care plan, so confirm per member.
Does EVV apply to BHT in California?: Generally not, and this is worth getting right rather than assuming. California implemented EVV for Personal Care Services from 1 January 2022 and Home Health Care Services from 1 January 2023. BHT is neither category, so it does not ordinarily fall under CalEVV. If you also deliver PCS or HHCS, those visits do — through CalEVV or an Alternate EVV system that forwards data to the state aggregator, which Sandata operates.

Sources — checked 2026-09-08

DHCS — Behavioral Health Treatment
DHCS — Behavioral Health Treatment (BHT) Frequently Asked Questions
DHCS — Medi-Cal enrolment for QAS provider organisations and individuals
DHCS — California Electronic Visit Verification

Published as a starting point, not as billing advice. Medi-Cal policy is revised regularly and plan-level rules vary — confirm against the current source before you bill.

ABA software in California

Made for how California practices bill and deliver ABA.

Running an ABA practice in California means billing Medi-Cal and commercial payers under their specific code and modifier rules, and — where your services fall under it — meeting California's Electronic Visit Verification requirements. Wilma® is all-in-one ABA software that handles both natively: state payer rule packs and native EVV on the same record as your data collection, session notes, scheduling, and parent portal — so a booked session becomes a verified visit and a clean claim without re-keying or a separate portal.

Bill Medi-Cal without the busywork.

Wilma bills ABA-specific CPT® and HCPCS codes with the payer-specific modifier rules California plans require, tracks authorization units live, and scrubs claims before they ship — so California Medicaid and commercial claims go out clean the first time.

Payer rule packs

California modifier and code rules applied per claim.

Auth tracking

Units decrement per session; renewals surface early.

EDI + ERA

Clearinghouse built in; ERAs auto-post to claims.

Intake capture

Insurance captured at intake, on the record.

EVV compliance, where California requires it.

Where your California Medicaid services fall under Electronic Visit Verification, Wilma captures the visit natively — time- and location-stamped, geofenced where required, and aligned to your state's EVV program — so verified visits feed billing with nothing to reconcile in a separate portal.

Native EVV

Captured on the schedule, not a bolt-on app.

Aggregator-ready

Built to align with California's EVV program.

Geofenced

Clock-in/out verification where required.

Verified → billed

A verified visit is a billable visit.

Every workflow your California practice runs, on one record.

Data collection, scheduling, session notes, billing, EVV, a parent portal, supervision, and compliance on one database — so California clinicians capture data once and it flows into the note and the claim without re-keying.

Data → notes

AI drafts the note; the BCBA reviews and signs.

One login

No pile of disconnected tools to reconcile.

Parent portal

Branded, on the same record as care.

Supervision

BACB ratios and credential expirations tracked.

Priced flat — from a single clinic to a multi-site California group.

Wilma is $30/user/month with a 10-licence minimum, so a California practice starts at $300/month for the full platform — no per-client fees, so your cost doesn't balloon as your caseload grows. Multi-site groups get multi-entity billing with NPI per location and SSO on the same data model.

Flat pricing

Published $30/user/month, 10-licence minimum. No per-client fees.

Multi-entity

NPI, tax ID, and billing per location.

Live in 1–2 weeks

Migration included in onboarding.

No replatforming

Same platform as you grow in-state.

Buyer's Checklist

Evaluating ABA software in California? Demand every line.

Go deeper on the pieces that matter in California:

FAQ

ABA software in California — questions, answered.

Does Wilma support Medi-Cal billing?

Is Wilma California EVV compliant?

How much does ABA software cost in California?

Is Wilma a fit for a solo BCBA in California?

Does Wilma work for multi-site California practices?

How long does it take to switch in California?

Is Wilma HIPAA compliant?

See Wilma® run a California practice, end to end.

Thirty minutes. Bring your California payer mix and EVV requirements — we'll show a booked session become a verified visit and a clean claim on one record.

Keep reading

Related guides on running an ABA practice — the same operation, from a different angle.