Selling, buying, or expanding an ABA practice in California: the license, the records, and the deal

Change of ownership: equity versus asset in California

California's equity-versus-asset decision turns on two credentials that are issued to a specific entity and not assigned.

• Equity sale. The buyer acquires the entity, which keeps its Medi-Cal enrollment subject to the Department of Health Care Services' ownership-change disclosure rules, its managed care plan contracts, and its regional center vendorization subject to the regional center's review of the change. The entity's contracts, authorizations, and vendor number continue.
• Asset sale. The buyer takes assets but not the entity, so the buyer must hold its own Medi-Cal enrollment and plan contracts, and must be vendorized by each regional center whose consumers it will serve, before billing. Because vendorization is issued to a vendor for a service code and is not transferable, an asset deal rebuilds the regional center relationship from the application stage.
• The practical consequence. California favors equity structures because they preserve enrollment and vendorization; an asset deal is planned around the regional center's vendorization timeline, which is set by the regional center rather than by the parties.

The first question in a California deal is which payors the practice bills, because a regional center caseload adds a vendorization rebuild that a commercial or Medi-Cal managed care caseload does not.

No license, and no OHCA review, but a vendorization that does not assign

California does not license behavior analysts and does not license an outpatient ABA office as a clinic, as the California facility page explains, so there is no state credential to strand in a deal. The state's health care transaction review does not reach the practice either, and the reason is definitional.

The list is closed. A physician organization under subdivision (r) is a group of twenty-five or more physicians or a high-cost outlier, and a psychology group is not one. An outpatient ABA practice, under either archetype, is not a provider, is not a health care entity, and does not file the 90-day notice under 127507 or face a cost and market impact review. AB 1415, signed October 11, 2025 and effective January 1, 2026, extended the notice obligation to private equity groups, hedge funds, newly created entities, and management services organizations, but subdivision (o) defines a management services organization as one providing management and administrative support services for a provider, so an MSO whose clients are ABA practices is outside it on the same definition. Two cautions: a transaction in which a listed entity is a party, such as a hospital system or a licensed clinic acquiring an ABA practice, is noticed by that entity on its own thresholds; and OHCA's AB 1415 regulations were in informal comment in May 2026 and should be read when adopted (Cal. Health & Safety Code 127500.2(o), (r), (t); 127507; 22 CCR 97431 et seq.; AB 1415 (2025)).

What does gate the deal is vendorization. A regional center vendorizes a provider for a specific service code after reviewing qualifications, and the vendor number is the credential through which Lanterman Act consumers are served and billed. It is issued to the vendor, not sold with the practice.

Expanding into California: enrollment and vendorization by regional center

For an out-of-state operator, California entry is a payor-by-payor credentialing exercise:

• Foreign registration or a parallel entity. The operator registers the home-state entity or forms a California entity; ownership of an ABA-only practice is open, and a psychologist-owned practice uses the professional corporation form.
• Medi-Cal enrollment and plan contracting. The entity enrolls with the Department of Health Care Services and credentials with each Medi-Cal managed care plan under the Health and Safety Code 1374.73 behavioral health treatment mandate.
• Vendorization. The entity applies to each regional center whose consumers it will serve, for each service code, under 17 CCR 54342, and the regional center's timeline governs.
• No transaction review. Entry by acquisition of a California ABA practice is outside the OHCA notice on the statute's face, subject to the cautions above.

The practical rule for entry is that California is a credentialing state with twenty-one regional centers: the number of regional centers in the operator's footprint, not the state, sets the timeline.

Ownership restructuring on entry

California's ownership rules for ABA fork by archetype, as the California ownership page and the California entity page explain: an ABA-only practice may be owned by anyone, while a practice in which a licensed psychologist practices through the entity uses a psychological corporation subject to the Moscone-Knox ownership limits. The transaction point is that a buyer of a psychologist-owned practice either keeps a qualifying licensee in the required ownership position or restructures so the psychologist practices through a separate professional corporation; in either case the Medi-Cal ownership disclosures and the regional center vendor file must reflect the post-closing structure.

Medi-Cal re-enrollment and the regional center on a change of ownership

Medi-Cal enrollment is personal to the enrolled provider under the Welfare and Institutions Code's provider enrollment provisions, and a change of ownership is disclosed and, for an asset buyer, replaced by a new enrollment; the application mechanics were not re-read for this page and should be confirmed with the Department of Health Care Services. Regional center vendorization is issued under 17 CCR 54342 to a specific vendor for a specific service code and does not transfer; the regional center reviews an ownership change in an equity deal and vendorizes the buyer afresh in an asset deal (Welf. & Inst. Code 14043.1 et seq.; 17 CCR 54342).

• The practice with in-house diagnostics. A licensed psychologist may be the practice's diagnosing professional for the 1374.73 mandate and for the regional center's eligibility determinations; the psychologist's own Medi-Cal enrollment and Board of Psychology license follow the individual, so a buyer that loses the psychologist loses the in-house diagnostic path.
• The ABA-only practice. Its diagnoses come from outside physicians and psychologists, so the buyer inherits referral relationships rather than a credential to retain.

The California Medicaid page covers the 1374.73 mandate, the plan credentialing standards, and the regional center service codes.

Records custody on a transfer

Client records must remain with a custodian bound by HIPAA and, where the practice has a licensed clinician, by the Confidentiality of Medical Information Act, which reaches providers of health care licensed under the Business and Professions Code and therefore reaches the psychologist archetype and not the ABA-only practice, as the California facility page explains. The retention tail is what a buyer inherits: Medi-Cal requires records to be kept ten years from the latest of the end of the plan contract, the completion of any audit, or the date of service, regional center vendors keep records five years from final payment for the state fiscal year, and a psychologist keeps records seven years from discharge or seven years from a minor's eighteenth birthday (Welf. & Inst. Code 14124.1; 17 CCR 50605(a); Bus. & Prof. Code 2919). In an equity sale the records and the tails stay with the entity; in an asset sale, custody must be specifically addressed so a custodian remains responsible for the full Medi-Cal tail and, for a psychologist's file, the 2919 period, with the thirty-day breach clock under Civil Code 1798.82 allocated in the agreement.

Non-compete enforceability in California

California voids restraints on a profession by statute, and the sale-of-goodwill exception is the only tool a buyer has.

• Employee covenants. Subdivision (b), added in 2024, directs that the section be read broadly under Edwards v. Arthur Andersen to void any employment non-compete no matter how narrowly tailored; 16600.5 makes a void covenant unenforceable regardless of where or when it was signed and gives employees a private right of action; 16600.1 required written notice to affected employees by February 14, 2024. A behavior analyst's or technician's non-compete is void, and attempting to enforce one is itself actionable.
• The sale-of-goodwill exception. Section 16601 permits an owner who sells the goodwill of a business, or all of the owner's interest in a business entity, or substantially all of its assets together with goodwill, to agree with the buyer to refrain from carrying on a similar business within a specified geographic area in which the business was carried on. Partial sales are tested with more nuance after Samuelian v. Life Generations Healthcare (2024), which evaluated a continuing owner's covenant for reasonableness rather than voiding it.
• The practical consequence. Retention of clinicians is built on compensation, equity, confidentiality, and trade-secret protection, not restraint; the selling owners' covenants are drafted precisely to 16601, tied to the goodwill conveyed, and limited to the geography in which the business operated (Cal. Bus. & Prof. Code 16600, 16600.1, 16600.5, 16601; Edwards v. Arthur Andersen LLP (2008) 44 Cal.4th 937; Samuelian v. Life Generations Healthcare, LLC (2024) 104 Cal.App.5th 331).

The practical rule is to expect no employee non-compete to survive, to draft the sellers' covenant to 16601 with counsel, and to price clinician retention accordingly.

Diligence flags specific to California

The state-neutral diligence workstreams are covered in the ABA due diligence playbook. The items that change specifically in California are:

• Regional center inventory. List every regional center, service code, and vendor number the practice holds, the consumers served under each, and the regional center's stated timeline for a new vendorization; an asset deal rebuilds all of it.
• OHCA status. Confirm no listed provider or physician organization is a party, and read OHCA's AB 1415 regulations once adopted for any change to the MSO definition.
• Medi-Cal enrollment and plan contracts. Confirm a clean enrollment and each managed care plan credentialing file; plan the buyer's own enrollment for an asset deal.
• Psychologist dependency. If the practice diagnoses in-house, confirm the psychologist's license, enrollment, ownership position in the professional corporation, and intent to stay.
• Records tail. Confirm the ten-year Medi-Cal period runs from the end of the plan contract, and settle who carries it.
• Covenant inventory. Treat every employee non-compete as void and confirm the 16600.1 notices were sent; draft the sellers' covenant to 16601.

Reading the California transaction friction

Putting the pieces together, California is a moderate-friction state whose friction is administrative and whose review regime does not apply. No license strands because none exists, OHCA's provider list does not include the practice, and ownership of an ABA-only practice is open. But Medi-Cal enrollment and regional center vendorization are personal to the entity, an asset deal rebuilds vendorization with every regional center in the footprint on the regional center's timeline, the Medi-Cal records tail runs ten years from the end of the plan contract, and no employee non-compete survives. The archetype decision shows up in the professional corporation and the diagnostic path: a psychologist-owned practice adds an ownership structure a buyer must preserve or unwind, and the psychologist is the credential a buyer must keep. None of this is legal, tax, or financial advice; it is the structure you would plan around with counsel and advisors.

How this connects to the rest of your compliance stack

This transaction page pulls together threads from across the guide:

• Facility and Medicaid. The clinic definition that excludes ABA, the CMIA reach that turns on licensure, and the Medi-Cal ten-year tail are on the facility page; the 1374.73 mandate and the regional center service codes are on the Medicaid page. See the California facility-licensure page and the California Medicaid page.
• Licensing and credentialing. California's absence of a behavior analyst license, and the payor credentialing that stands in for it, are on the licensing page. See the California licensing page.
• Ownership and entity. Open ownership for ABA-only practices and the Moscone-Knox limits on a psychological corporation are on the ownership and entity pages. See the California ownership page and the California entity page.
• The state-neutral deal mechanics. Diligence, deal structures, private equity, expansion, and wind-down are covered on the spoke's concept pages, linked below.

Sequencing a California deal or expansion

1. Inventory the payor credentials. List Medi-Cal enrollment, each managed care plan credentialing, and every regional center vendorization by service code; for an asset deal, start the buyer's vendorization applications first because the regional center sets the clock.
2. Run the OHCA screen. Confirm no 127500.2(t) provider or physician organization is a party; document the conclusion; calendar a re-read when the AB 1415 regulations are adopted.
3. Choose the structure. Prefer equity to preserve enrollment and vendorization; if an asset deal, sequence closing after the buyer's enrollment and vendorizations are issued.
4. Preserve the professional corporation. If a psychologist practices through the entity, keep a qualifying licensee in the required ownership position or move the psychologist to a separate professional corporation before closing.
5. Settle records custody. Assign the ten-year Medi-Cal tail, the five-year regional center period, and any 2919 duty to a named custodian, and allocate the thirty-day breach clock.
6. Draft covenants to 16601. Tie the sellers' covenant to the goodwill conveyed and the geography served; send no employee non-compete; confirm the 16600.1 notices were given.

California transaction variables at a glance

Frequently asked questions