Healthcare Controversies · Corporate ownership and clinical control
Clinical Independence after SB 351
Private equity, management companies, and the gap between a statute and control of the practice
California now forbids private equity groups and hedge funds from controlling ten named decisions in physician and dental practices. Whether a practice is physician-controlled still turns on succession rights, budgets and records of who actually decided.
The dispute, and why it matters
California has long held that a lay corporation may not practise medicine, and the Medical Board has long published a list of the decisions that belong to physicians. What changed on 1 January 2026 is that a statute now applies a version of that list, in terms, to one class of investor: private equity groups and hedge funds involved with physician and dental practices. Proved K01K02 The question this article examines is the one that the statute makes newly precise and does not answer: where does lawful capital, administration and advice end, and where does control of the practice begin?
The dispute matters because modern practice is rarely a physician-owned office with its own payroll, billing and information technology. It is more often a professional corporation owned on paper by one or more physicians, joined by contract to a management services organisation (MSO) that supplies nearly everything except the licence. That arrangement can keep small practices alive. It can also leave the licensed owner with the formal title and the management company with the levers that decide what the practice can afford to do. Neither description is self-proving. Each has to be tested against agreements, budgets and decisions.
Finding, as of 1 November 2026
SB 351 codifies, for private equity groups and hedge funds as the statute defines them, the decisions the Medical Board already reserves to physicians, voids contract terms that enable those groups to take them, and bars certain gag and non-compete clauses in management and asset-sale contracts. Proved It gives the Attorney General injunctive and equitable remedies; the text contains no penalty provision and names no other enforcer. Proved Its central exception — that a group may assist or consult so long as the physician retains ultimate responsibility for, or approval of the decision — means that compliance turns on records of who actually decided, not on the wording of the management agreement alone. Inference
Stated by the operative text itself: a statute, regulation, court opinion or the study's own published results.
An official dataset, agency report, guideline or plan publication, read for what it measures and no further.
Reported by a party, news organisation or secondary summary; confined to what the reporter says.
KPSGILL analysis from structure, incentives or comparison — labeled, never promoted to fact.
A question the public record does not yet answer; the record that would answer it is named.
What SB 351 actually says
SB 351 (Cabaldon) was approved and chaptered on 6 October 2025 as Chapter 409, Statutes of 2025, and adds Division 1.7, “Private Equity or Hedge Fund Ownership of Health Care Practices,” to the Health and Safety Code. Proved K01 The Medical Board's quarterly newsletter listed it among the new laws for 2026. Documented K02
Definitions. Section 1190 defines a hedge fund as “a pool of funds managed by investors for the purpose of earning a return on those funds, regardless of the strategies used to manage the funds,” and a private equity group as “an investor or group of investors who primarily engage in the raising or returning of capital and who invests, develops, or disposes of specified assets.” Proved K01 Passive contributors, hospitals and hospital systems and their affiliates, and public agencies are excluded from both definitions; entities that provide debt financing are excluded from the hedge-fund definition only. Proved
Interference with professional judgment. Section 1191(a)(1) bars a covered group from interfering “with the professional judgment of physicians or dentists in making health care decisions,” and then names four decisions: determining what diagnostic tests are appropriate; the need for referrals or consultations; responsibility for the ultimate overall care of the patient, including treatment options; and how many patients a clinician must see in a given period or how many hours the clinician must work. Proved K01
Business decisions that cannot be controlled or delegated. Section 1191(a)(2) then lists six functions that a covered group may not control and may not be delegated: owning, or determining the content of, patient medical records; selecting, hiring or firing physicians, allied health staff and medical assistants on the basis of clinical competency or proficiency; setting the parameters of contracts with third-party payers; setting clinical-competency parameters for contracts with other physicians; making coding and billing decisions; and approving the selection of medical equipment and supplies. Proved K01
Contracts, gag clauses and remedies. Subdivision (c) bars contracts that would enable any of these and makes offending provisions void. Proved Subdivision (d) prohibits management-services and asset-sale contracts from barring providers from competing with the practice after they leave, or from disparaging or commenting on the quality of care, utilization, ethics or “revenue-increasing strategies” of the practice or the group — while preserving non-competes tied to the sale of a business and confidentiality for material non-public information. Proved Subdivision (e) provides that “The Attorney General shall be entitled to injunctive relief and other equitable remedies a court deems appropriate,” together with attorneys' fees and costs. Proved K01
The carve-out. Subdivision (h) preserves a covered group's ability to assist, consult or provide input on the listed matters, “provided that the physician or dentist retains the ultimate responsibility for, or approval of, those decisions and activities.” Proved K01
| Reserved decision | What compliance would look like in the record | What interference would look like in the record |
|---|---|---|
| (a)(1)(A) Diagnostic tests | Order sets and testing protocols adopted or approved by the professional entity's medical leadership, with dated approvals | Test menus restricted or removed by a management directive; utilisation targets tied to manager compensation |
| (a)(1)(B) Referrals and consultations | Referral pathways approved by physicians; documented physician override of network defaults | Required in-network or affiliated referrals imposed without physician approval; denial of physician-requested consultations on cost grounds |
| (a)(1)(C) Ultimate overall care and treatment options | Clinical policies signed by the physician-owner or medical director; minutes recording physician adoption, amendment or rejection | Clinical policies issued by the manager and treated as binding without professional adoption |
| (a)(1)(D) Patient volume and hours | Scheduling templates set or approved by physicians; documented exceptions for complexity | Visit quotas or panel sizes set in the management agreement or budget and enforced through compensation |
| (a)(2)(A) Medical records — ownership and content | Records held by the professional entity; manager access governed by a business-associate role; content edits limited to authorised clinicians | Manager owns the record system and controls templates, required fields or post-signature amendments |
| (a)(2)(B) Clinical hiring and firing on competency | Credentialing and competency decisions made by the professional entity's physicians | Clinician terminations or hires on competency grounds decided by the manager |
| (a)(2)(C) Payer-contract parameters | Physician approval of the rate floors, service scope and utilisation terms the manager may negotiate | Manager negotiates and binds the practice without physician-approved parameters |
| (a)(2)(D) Competency terms in contracts with other physicians | Professional entity sets the clinical qualifications in physician contracts | Manager drafts and imposes qualification terms |
| (a)(2)(E) Coding and billing | Coding policy approved by physicians; manager executes submission | Manager sets coding rules, edits physician coding or ties compensation to coding levels |
| (a)(2)(F) Equipment and supplies | Physician approval of formularies and equipment selections | Procurement decided by the manager without physician approval |
The middle and right columns are KPSGILL's evidentiary framework Inference: they identify the documents that would test compliance, not findings about any practice.
Where the list comes from: the Medical Board's guidance
The statutory list is close to word-for-word the Medical Board of California's long-standing description of the corporate practice of medicine. The Board's page identifies, as decisions that physicians must make, “Determining what diagnostic tests are appropriate for a particular condition;” the need for referrals and consultation; responsibility for overall care and treatment options; and patient volume and hours. Its business list includes ownership of medical records, “Selection, hiring/firing (as it relates to clinical competency or proficiency) of physicians, allied health staff and medical assistants,” payer-contract parameters, “Decisions regarding coding and billing procedures for patient care services,” and “Approving of the selection of medical equipment and medical supplies for the medical practice.” It adds that where others assist, “the physician must retain the ultimate responsibility for, or approval of, those decisions.” Documented K03
Two consequences follow. First, SB 351 did not invent a new theory of professional independence; it converted a regulator's guidance into a statute for one category of investor and attached an enforcement route. Inference Second, the Board's guidance continues to describe the general corporate-practice doctrine for everyone else — including MSOs that are not owned by a private equity group or hedge fund — but it remains guidance, not a regulation or an adjudication. Documented The site's longer treatments of the doctrine and of the PC–MSO boundary are at the corporate-practice doctrine in California and California's PC–MSO boundary.
Who is covered, and who is not
The statute's reach is narrower than its public description sometimes suggests. Its prohibitions apply to private equity groups and hedge funds as section 1190 defines them. Proved K01 A management company owned by physicians, by a hospital system, or by an ordinary operating company that is not a private equity group or hedge fund is outside the new division, although it remains subject to the general corporate-practice doctrine. Inference The hospital exclusion is express. Proved
The definitional questions will matter in practice. Whether an investor “primarily” engages in raising or returning capital; whether a portfolio company that owns an MSO is itself the covered group or merely its instrument; whether a lender that later converts debt to equity is a passive contributor or a covered investor — none of these is resolved by the text, and no reported decision applying section 1191 was located for this article. Open The answer to each will depend on facts about ownership, governance and conduct, not on what the parties call themselves.
What SB 351 establishes
- Ten named decisions are reserved to physicians and dentists as against covered private equity groups and hedge funds. Proved
- Contract provisions enabling a covered group to take those decisions are void. Proved
- Management and asset-sale contracts may not gag providers about quality, utilisation, ethics or revenue strategies, or bar post-departure competition (subject to sale-of-business and confidentiality savings). Proved
- The Attorney General may obtain injunctive and equitable relief plus fees and costs. Proved
What it does not establish
- That every MSO arrangement is unlawful, or that MSOs not owned by a covered group are governed by this division.
- A private right of action, a civil penalty, or an enforcement role for the Medical Board — none appears in the text read for this article.
- Any finding that a particular practice, investor or management company has violated it.
- How “ultimate responsibility for, or approval of” will be measured when the physician signs what the manager drafted.
Four tests of control
A serious inquiry into whether a practice is physician-controlled has to look past the share register. KPSGILL uses four layered tests. Inference Each corresponds to a different kind of record, and each can point in a different direction.
1. Formal ownership
Who holds the shares of the professional corporation, and are they licensed? This test is necessary and rarely sufficient. A professional corporation can be wholly physician-owned while every operational lever sits elsewhere. It is the question that a certificate of incorporation, a share ledger or a corporate-disclosure statement answers.
2. Succession and transfer rights
Who can replace the owner? Many PC–MSO structures pair a management agreement with a stock-transfer or succession agreement that lets the manager designate a new physician-owner if the current one dies, loses their licence, or — in some drafts — breaches the management agreement or refuses a directive. The California Attorney General's amicus brief in Art Center Holdings, Inc. v. WCE CA Art, LLC (No. B338625), filed in support of the trial court's ruling, puts the point directly: “When an agreement gives an unlicensed corporation the right to replace the physician-owner of a medical practice with a different physician of its choice, the corporation effectively owns the practice.” It adds that “MSOs are vendors and cannot own or operate medical practices, nor can they exert undue influence over licensed medical professionals.” Attributed K10 That is the Attorney General's legal position in a pending appeal, not a holding; the appeal's status after July 2026 was not verified. Open Its significance is methodological. On the Attorney General's view, a reserved right to replace the owner can amount to control even before anyone proves that a particular treatment decision was overridden. Inference
3. Budgets, contracts and compensation
Who sets the budget the physicians must work within, negotiates the payer contracts, employs the non-physician staff, owns the information systems, and determines physician compensation? A management agreement can reserve every clinical decision to the physicians while leaving them unable to fund any decision the manager does not support. Inference SB 351 reaches part of this: payer-contract parameters, coding and billing, equipment and supplies, and clinical hiring on competency grounds are each listed. Proved K01 It does not, on its face, regulate the size of a management fee or a budget allocation. Percentage-based management compensation raises separate questions under California's fee-splitting rules, examined in the site's fee-splitting analysis.
4. Actual decisions
Who decided, when, and on what authority? This is where the carve-out in subdivision (h) operates. A manager may assist, consult and recommend; the physician must retain ultimate responsibility or approval. Proved K01 The test is therefore documentary: physician minutes that adopt, amend or reject management proposals; policy versions signed by the medical director; an audit trail showing who changed an order set or a template; evidence that a physician refused a recommendation and that the refusal stuck. Inference Equally, the absence of any recorded physician rejection over a long period is not proof of control — it may mean the recommendations were sound. Inference The strongest evidence in either direction is a specific decision traced to a specific actor.
- Who holds the shares, and who can compel their transfer?
- Can the manager remove or replace the physician-owner, and on what triggers?
- Who approves the budget, and what happens to the practice if the physicians reject it?
- Who negotiates payer contracts, and within whose parameters?
- Who owns the record system and controls post-signature amendments?
- Who adopts clinical policies, and is there a record of a physician saying no?
- Who sets physician compensation, and is any part of it tied to coding levels, volume or referrals?
- Can the physicians terminate the management agreement without losing the practice?
Notice is not approval: AB 1415 and the transaction rules
A separate 2025 statute addresses visibility rather than conduct. AB 1415 (Chapter 641, Statutes of 2025) adds definitions of management services organisation, private equity group and hedge fund to the Office of Health Care Affordability statute and expands the entities that must give advance notice of covered transactions. Proved K04 Its MSO definition states that “Management and administrative support services shall include provider rate negotiation, revenue cycle management, or both.” Proved It requires 90 days' advance notice to the Office, extends notice duties to MSOs for covered transactions, and directs the Office to study and collect data on MSOs. Proved K04
The Office's amended Cost and Market Impact Review emergency regulations were filed with the Secretary of State on 2 October 2026 and take effect on . Proved K05K06 Among other changes, the amended section 97435(c)(9)(A) captures a transaction that “Results in the private equity group or hedge fund holding 10% or more of the assets, equity, debt, or liabilities of a health care entity.” Proved K05 The site's dated note on the effective date is at California's amended health-care transaction rules take effect November 2.
The distinction between the two statutes is important. AB 1415 and the regulations require notice and permit review; they do not authorise the Office to block a transaction. Documented SB 351 governs conduct after a transaction, whether or not it was noticed. A transaction can be properly noticed and later operated in a way that offends section 1191; a transaction can fall below a notice threshold and still be subject to it. Inference Whether a particular arrangement required notice depends on the operative definitions, thresholds, parties and dates — not on the presence of an MSO alone. Inference
Oregon and the federal proposals
Oregon went further in 2025. SB 951, enacted as Chapter 295 with an emergency clause, restricts MSO principals from owning a majority of, serving as directors or officers of, or managing a professional medical entity with which the MSO contracts, and bars an MSO from exercising “de facto control over administrative, business or clinical operations of a professional medical entity in a manner that affects the professional medical entity's clinical decision making,” including “Making diagnostic coding decisions.” Proved K07 It voids many non-compete, non-disclosure and non-disparagement agreements, and phases in: “Section 1 of this 2025 Act first applies on January 1, 2029, to management services organizations and professional medical entities that existed before the effective date.” Proved K07 Oregon later amended the measure through HB 3410 (2025); the amended content was not verified for this article. Open
The comparison clarifies California's choice. Oregon regulates the MSO relationship as such and uses a de facto control standard; California's SB 351 regulates one category of investor and lists reserved functions. Inference A California practice managed by an MSO that is not private-equity or hedge-fund owned remains outside SB 351, but it would fall within an Oregon-style rule. Inference
Federal proposals. On 16 September 2026, identical bills titled the “Stop Corporate Takeovers of Physicians Act of 2026” were introduced in the House (H.R. 10444, Rep. Hoyle, with ten cosponsors) and the Senate (S. 5419, Sen. Warren, with Sens. Wyden and Merkley). Proved K08K09 The introduced text would make it unlawful for an entity “that is not majority-owned and controlled by 1 or more licensees” to own or control a medical practice, would add a new exclusion ground for violators in the Social Security Act, and would not preempt state laws imposing “equal or more stringent ownership and control requirements.” Proved K08 These are proposals. Introduction is not enactment, and later action was not verified. Open
The strongest arguments on each side
The controversy is not between people who favour physician independence and people who oppose it. It is about whether outside capital and centralised management are the condition of independent practice surviving at all, or the mechanism by which it is hollowed out.
The strongest case for MSO and investor capital
- Independent practices face rising administrative, technology, compliance and payroll costs; shared management spreads them and may be the only alternative to closure or hospital employment.
- Capital funds electronic records, cybersecurity, billing infrastructure and recruitment that small practices cannot finance alone, and can sustain access in under-served areas.
- Professional judgment can be protected by contract and governance; the law already voids the wrong terms, and a statute that over-reads ‘control’ could drive capital away from primary care.
- Payer-contract negotiation and coding compliance are specialist functions that professionalised management may perform better and more lawfully than a solo physician.
The strongest critique
- The physician-owner can be a nominee whose shares the manager can reassign; succession and stock-transfer rights make formal independence revocable.
- Budget, compensation and staffing levers can steer clinical behaviour without any recorded ‘override’, so a statute that waits for proof of an overridden order will rarely be enforced.
- Debt-financed acquisitions can extract revenue through management fees and leave practices thinly capitalised, with continuity at risk when the financing fails.
- Gag and non-compete clauses suppress the clinicians best placed to report problems; SB 351's ban on them is an admission that they were in use.
Both sets of arguments can be true at once of different arrangements. The evidentiary task is to determine which one describes a particular practice, using the four tests above. Inference
What the statute leaves open
Four gaps stand out. Inference
Enforcement. The text read for this article names the Attorney General and equitable remedies; it contains no civil penalty and no private right of action. Proved K01 Whether physicians, patients or competitors can invoke section 1191 indirectly — for instance by asking a court not to enforce a void provision in a contract dispute — is a question of general contract and procedural law that the division does not address. Open A contract term that is void can still be raised as a defence; that much follows from subdivision (c). Inference
The carve-out. “Ultimate responsibility for, or approval of” can be satisfied by a physician signature on a document the manager wrote. Whether that is enough — whether approval must be informed, free of financial coercion and capable of being withheld — will decide how much the statute changes. Open
Scope. The division reaches private equity groups and hedge funds as defined. Practices managed by other forms of capital remain under the general doctrine and the Board's guidance. Proved K01K03
Proof. The relevant records — share ledgers, succession agreements, budgets, board minutes, policy versions, audit trails — are private. Without a statutory disclosure obligation running to the public, the statute's effect will be visible mainly through litigation and Attorney General action. Inference AB 1415's notice regime increases visibility of transactions, not of day-to-day control. Inference
How this bears on the site's CFMG–Wellpath record
The site's long-running investigation of California Forensic Medical Group and the Wellpath enterprise examines exactly the questions this article sets out — ownership, succession, management authority and actual decisions — in a correctional-health setting. Its treatments are at Who controls a medical corporation?, Physician ownership and the missing stock-transfer agreements, Article 028, and the California CPOM enforcement record.
Three limits govern that application. First, no court or agency has found that the CFMG–Wellpath structure violates California's corporate-practice rules; the investigation identifies questions and the documents that would answer them. Open Second, SB 351 applies only to private equity groups and hedge funds as defined, and whether any investor in the reorganised Wellpath enterprise is such a group in relation to CFMG is a factual and legal question that the public record reviewed here does not resolve. Open Third, SB 351 operates from 1 January 2026; it does not, by its terms, reach earlier conduct. Inference The value of the statute for that investigation is that it supplies an official list against which the existing management agreements and any successor arrangements can be read. Inference
Reform options, and how to judge them
The options below are KPSGILL proposals Inference, stated with the criterion each should be judged by.
| Option | What it would do | How to judge it |
|---|---|---|
| Succession-right limits | Prohibit or restrict manager-designated replacement of a physician-owner except on death, incapacity or loss of licence | Whether physician-owners can reject a management directive without losing their shares |
| Termination without forfeiture | Allow the professional entity to end a management agreement on reasonable notice without forfeiting the practice, records or staff | Number of practices able to change managers; continuity of patient records through transition |
| Decision logging | Require a dated record of physician approval or rejection for each §1191 reserved function | Whether the log reveals physician rejections over time; audit findings |
| Extension beyond private equity | Apply the §1191 list to all MSOs, Oregon-style, with a de facto control standard | Effect on access and practice closures in under-served counties, measured before and after |
| Public reporting | Annual filing of ownership, succession rights and management-fee structure for practices above a size threshold | Completeness and timeliness of filings; use by regulators |
| Board role | Give the Medical Board a defined investigative role alongside the Attorney General | Investigations opened and resolved; time to resolution |
Correction history
No corrections since first publication on . Material corrections will be dated here, with the superseded text preserved and labeled.
Sources
Official issuers, statutes, opinions and original studies are preferred; reproductions of primary legal text are identified. Checked 1 November 2026 unless stated. A source that opens is not proof of every neighbouring claim.
- K01SB 351 (Cabaldon), Chapter 409, Statutes of 2025 — Health and Safety Code §§1190–1192 (chaptered text)
- K02Medical Board of California, Newsletter Vol. 172 — New Laws in 2026
- K03Medical Board of California — Corporate Practice of Medicine (Practice Information)
- K04AB 1415 (Bonta, M.), Chapter 641, Statutes of 2025 — Health and Safety Code §§127500.2, 127507 (chaptered text)
- K05HCAI — Approved text of the Cost and Market Impact Review (CMIR) emergency regulations
- K06California Office of Administrative Law — Other effective dates
- K07Oregon SB 951 (2025), enrolled — Chapter 295, Oregon Laws 2025
- K08H.R. 10444, Stop Corporate Takeovers of Physicians Act of 2026 (introduced)
- K09S. 5419, Stop Corporate Takeovers of Physicians Act of 2026 (introduced)
- K10California Attorney General — amicus brief, Art Center Holdings, Inc. v. WCE CA Art, LLC, No. B338625 (Cal. Ct. App., 2d Dist., Div. 3)
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