The five rows below carry the operative statutory language verbatim, each quote pulled from the official code. This page is one state from the full state-by-state reference. Nothing here is legal, tax, or financial advice.
The five-part test in brief
Whether an ABA practice needs a professional entity is a stack of five questions. The licensing act is the gateway, because an unlicensed profession is generally not a professional service and an ordinary entity governs. The professional-entity statute supplies the form and the ownership rule that applies if that form is used. The scope definition decides whether ABA is actually inside that statute. The corporate-practice doctrine, a separate body of law that often lives in the medical practice act or case law rather than the entity statute, is usually what forces licensed ownership and pushes outside capital into a management company. And the fee-splitting and anti-remuneration rules constrain management-fee economics even where ownership is open. The rows below run those five against this state's actual code, quoting the operative language so the position rests on the statute.
California, provision by provision
California
Nuanced: open for ABA-only, mandatory professional corporation for in-house diagnosticsHolding: a non-licensee may wholly own a standard California LLC that delivers ABA-only services. Where the same practice employs a licensed psychologist to perform diagnostic evaluations, that piece of the business must run through a Moscone-Knox psychological corporation, and no LLC is available for it at all.
No. California has never enacted a behavior-analyst license. Senate Bill 479 (2015) would have created one under the Board of Psychology, but its board provisions were structured to sunset and were repealed by 2019 without licensure ever taking effect. Assembly Bill 1715 (2016), the reintroduction, was withdrawn from further consideration in June 2016. What functions as the credential instead is BACB certification, verified separately through payor mandates and DDS vendorization, not through a state license.
Conclusion. ABA is not a licensed profession in California, which is the gateway this whole framework runs on, and for ABA-only practice, the gateway simply does not open.
California's mandatory professional-entity statute, the Moscone-Knox Professional Corporation Act, only reaches "professional services," and that term is defined by reference to state licensure. Because ABA carries no license, certification, or registration requirement under the Business and Professions Code, it does not meet that definition, and Moscone-Knox never engages for ABA-only practice. Where the practice separately employs a licensed psychologist, Moscone-Knox does apply to that psychologist's professional services, requiring a psychological corporation with ownership capped at a 51 percent minimum for psychologists and up to 49 percent for a short list of allied licensed professions, no lay ownership beyond a narrow assistant secretary or treasurer exception.
Conclusion. No professional entity is required for ABA-only practice, because Moscone-Knox never reaches it. Where the practice includes in-house diagnostics, the psychologist piece requires a Moscone-Knox psychological corporation, and even that mandatory form caps outside, non-licensee ownership at zero beyond the narrow statutory exception.
It does not, and the reason is structural rather than a scope carve-out: Moscone-Knox's definition of "professional services" is built entirely on the existence of a license, certification, or registration requirement, and California has never enacted one for behavior analysis. This is different from a state that licenses ABA but exempts it from the professional-entity statute by name; here, there is simply no license for the statute to hook onto.
Conclusion. The LLC bar in Section 17701.04 applies only to services that are "professional services" under Section 13401, and ABA-only services do not meet that definition. An ABA-only LLC is not barred by this statute.
Ownership. No ownership-by-law rule restricts who may hold equity in an ABA-only practice. California's corporate-practice-of-medicine doctrine and its Moscone-Knox statutory counterpart are both anchored to licensed professions, and behavior analysis is not one. A non-licensee may wholly own a standard LLC or corporation that delivers ABA-only services in California, something not true of nearly any other healing-arts-adjacent service in the state precisely because ABA has never been licensed.
Clinical control. Where the practice runs in-house diagnostics, the picture inverts completely. The psychologist performing diagnostic evaluations must practice through a Moscone-Knox psychological corporation, majority-owned and controlled by licensees in that profession, with the corporation's practice restricted to the single profession for which it is organized. A single combined entity cannot lawfully hold both an open ABA-only ownership structure and a Moscone-Knox-compliant psychological-services line; operators running both service lines typically separate them into distinct entities.
Conclusion. A non-licensee may wholly own a standard California LLC or corporation that delivers ABA-only services. A non-licensee may not hold voting control of the entity delivering in-house diagnostic services; that piece requires a licensee-controlled Moscone-Knox psychological corporation.
California's principal fee-splitting statute, Business and Professions Code Section 650, prohibits licensees from offering, delivering, receiving, or accepting rebates or fee-splitting for patient referrals. Because ABA is not a licensed profession, Section 650 does not directly reach ABA-only billing arrangements the way it reaches a licensed psychologist's referral relationships. Any ABA practice billing California's Medi-Cal program, the DHCS Behavioral Health Treatment benefit, or commercial insurers remains fully subject to the federal Anti-Kickback Statute and the Stark self-referral rules, which do not depend on state licensure and apply regardless.
Conclusion. A management agreement between an MSO and an ABA-only clinical entity should be priced at fair market value to satisfy the federal anti-kickback and Stark framework; California layers on no separate state fee-splitting bar for the unlicensed ABA-only piece, though Section 650 fully applies to any licensed psychologist's practice within the same organization.
ABA is not a licensed profession in California (axis one), so Moscone-Knox, the state's mandatory professional-entity statute, never engages for ABA-only practice because its "professional services" definition is built entirely on the existence of a license (axes two and three). No corporate-practice or ownership-by-law rule reaches an unlicensed profession, so a non-licensee may wholly own a standard California LLC delivering ABA-only services (axis four). The money rules for that ABA-only piece come from the federal and payor side rather than a state fee-splitting statute (axis five). Where the same organization also runs in-house diagnostics through a licensed psychologist, every one of those answers flips for that piece: Moscone-Knox applies, an LLC is unavailable, ownership is capped at the statutory licensee-majority split, and Section 650 applies in full. Therefore California requires two different entity analyses inside one practice, not one.
Outlook: how this verdict could change
Likelihood of change: Moderate. California has seen two failed licensure bills already, SB 479 (2015) and AB 1715 (2016), and CalABA continues to advocate for a third attempt. A future licensure act is the single change that would restructure this entire page, since it would give Moscone-Knox something to attach to for the first time.
What to watch. Any new California Assembly or Senate bill creating behavior-analyst licensure, and any amendment to the Moscone-Knox "professional services" definition itself, though the latter is far less likely than a new licensure bill.
Disruption if it changes: High. Unlike a state that already licenses ABA and might tighten an existing ownership rule, California licensure would be a first-time event that could immediately convert every open ABA-only entity in the state into one facing a Moscone-Knox analysis, a materially larger structural shift than the incremental tightening seen elsewhere.
Where professional advice is essential, not optional
Verbatim statutory text is a starting point, not a conclusion. Statutes are amended, agencies issue rules that fill them in, and courts interpret them. California's two-archetype split is also easy to get wrong in practice: a practice that grows from ABA-only into offering in-house diagnostics needs to restructure at exactly that transition point, not after the fact. Use this page to locate the operative provisions and to speak from the source, then confirm the current text and citations against the official code and engage qualified California counsel before acting. Nothing here is legal, tax, or financial advice.
The provisions quoted here change and are interpreted by agencies and courts, and California's behavior-analyst licensure question in particular has been legislatively active before. The official California code and qualified California counsel are the authoritative sources. Neither this page nor any secondary source should be relied on in place of direct verification and professional advice.