A non-physician cannot own a medical practice in California. State law reserves ownership of a medical practice for licensed physicians and a narrow group of allied health professionals, and it treats any arrangement that gives a layperson real control over clinical decisions as the unlicensed practice of medicine. If you are a non-physician who wants a financial stake in healthcare delivery here, the legal path runs through a separate business called a management services organization, which handles the administrative side while a physician-owned professional corporation keeps control of everything clinical.
Why California Bans Non-Physician Ownership
The rule comes from what California calls the corporate practice of medicine doctrine. Business and Professions Code Section 2400 says flatly that “corporations and other artificial legal entities shall have no professional rights, privileges, or powers.”1California Legislative Information. California Code BPC 2400-2417.5 – Corporations A corporation cannot attend medical school, pass boards, or take an oath to a patient, so the state does not let one own a practice or employ the doctors who do.
The Medical Board has been specific about which calls belong to a physician alone: how many patients a doctor sees, which diagnostic tests get ordered, who gets referred to a specialist, which prescriptions get changed, and who controls the medical record. A non-licensed person or entity making any of those decisions has crossed into unlicensed practice.
The penalties are real. Business and Professions Code Section 2052 makes practicing medicine without a license a crime punishable by a fine up to $10,000 and up to a year in county jail, or state prison time.2Medical Board of California. Unlicensed Practice Both the non-licensed person and the physician who allowed the arrangement can be charged.
Who Is Allowed to Own Shares
The only ownership vehicle for a California medical practice is a Professional Medical Corporation formed under the Moscone-Knox Professional Corporation Act. Business and Professions Code Section 2408 requires every shareholder, director, and officer to be a licensed medical professional, with limited exceptions set in the Corporations Code.3California Legislative Information. California Code BPC 2408
The main exception is Corporations Code Section 13401.5, which lets a defined list of allied health professionals (podiatrists, psychologists, registered nurses, physician assistants, physical therapists, pharmacists, and others) hold shares, sit on the board, or serve as officers of a medical corporation. Their combined ownership cannot exceed 49% of total shares, and their number cannot exceed the number of physician shareholders.4California Legislative Information. California Code CORP 13401.5
Anyone not on that list is barred from holding even one share. That includes business investors, hospital systems, and private equity firms. California is stricter than many other states on this point, and the prohibition applies no matter how much capital the investor is willing to put in or how passive they promise to be.
One useful detail: Section 2408 does allow non-licensed individuals to hold administrative titles inside the corporation, including executive vice president, chief executive officer, and executive secretary.3California Legislative Information. California Code BPC 2408 A title is not a share and is not clinical authority, but a non-physician can run day-to-day business operations from inside the corporation without owning any part of it.
The Management Services Organization Model
For a non-physician who wants a real financial stake, the management services organization (MSO) is the established route. The structure uses two separate entities. A Professional Medical Corporation, owned by one or more physicians, retains all clinical authority. A second company, the MSO, handles administration. The MSO can be owned entirely by non-physicians, including private equity firms and other corporate investors.
The two entities are connected by a management services agreement that defines what the MSO does and what it is paid. Typical MSO responsibilities include billing and collections, marketing, lease negotiation, equipment procurement, IT systems, and payroll for non-clinical staff. The medical corporation keeps exclusive authority over hiring and firing of clinical staff, treatment decisions, medical records, and clinical protocols.
There is a hard line the MSO cannot cross: it cannot employ physicians or other clinical staff, whether as W-2 employees or independent contractors. All clinical personnel have to be employed by or contracted through the professional medical corporation itself. Administrative staff can sit on either payroll.
How the MSO Gets Paid
The compensation terms are where most arrangements get into trouble. Management fees have to reflect fair market value for the administrative services actually provided. Tying the MSO’s pay to a percentage of the practice’s revenue or profits creates a strong inference of illegal fee-splitting under Business and Professions Code Section 650.5California Legislative Information. California Code BPC 650 A first-offense Section 650 violation carries up to one year in county jail, state prison time, a fine up to $50,000, or a combination. A second conviction brings state prison and the same $50,000 fine.
Fixed-fee and cost-plus structures are the safer models because the amount paid does not rise with patient volume or practice revenue. If the management fee swallows most of what the practice earns, regulators will treat the MSO as the real owner and the physician as a figurehead, which collapses the whole structure.
Branding and the Fictitious Name Permit
MSO investors often want the practice to carry their brand. Business and Professions Code Section 2415 requires a physician practicing under any name other than their own to obtain a Fictitious Name Permit from the Medical Board.6California Legislative Information. California Code BPC 2415 The permit requires that the applicant hold a current physician’s license and that the practice be “wholly owned and entirely controlled” by that physician. The application fee is $70, and processing takes four to six weeks.7Medical Board of California. Fictitious Name Permit
The permit belongs to the physician, not the MSO. Even if the MSO licenses its brand to the practice through a management agreement, there is no legal mechanism to force the physician to surrender the permit if the relationship ends. Any investor planning to spend meaningfully on marketing should understand this before building a brand around a specific practice.
The “Friendly PC” Problem
Some investors push the MSO structure further by finding a physician willing to serve as the nominal shareholder of the professional corporation while the MSO retains effective economic and operational control. On paper the physician owns the practice; in reality the investors are running it. California regulators have been clear that decisions about clinical hiring, equipment selection, medical records, and patient volume belong to the physician. When an MSO makes those decisions instead, the arrangement stops being a management relationship and becomes the unlicensed corporate practice of medicine. These structures can function for years without drawing attention, and then unravel in a single complaint, lawsuit, or audit.
Federal Rules That Apply If the Practice Bills Medicare or Medicaid
California’s state restrictions are only half the picture. A practice that bills federal healthcare programs is also subject to two federal statutes that shape how an MSO can be paid.
The Anti-Kickback Statute, 42 U.S.C. Section 1320a-7b, makes it a felony to knowingly offer or receive anything of value in exchange for referring patients to a provider that bills a federal program. A conviction carries up to $100,000 in fines, up to 10 years in prison, or both.8Office of the Law Revision Counsel. 42 USC 1320a-7b – Criminal Penalties for Acts Involving Federal Health Care Programs Management fees that reward referrals can be recharacterized as kickbacks. The Department of Health and Human Services has established regulatory safe harbors at 42 CFR Section 1001.952 that protect certain payment structures, generally requiring compensation set in advance at fair market value and not varied by referral volume.9Office of Inspector General. Safe Harbor Regulations
The Stark Law, 42 U.S.C. Section 1395nn, prohibits physicians from referring patients for certain designated health services to entities where the physician or a family member has a financial relationship, unless an exception applies.10Office of the Law Revision Counsel. 42 USC 1395nn – Limitation on Certain Physician Referrals CMS has revised the regulations several times to address new business models, and the financial relationship between an MSO and a physician can complicate the exception analysis.11CMS. Physician Self-Referral State and federal compliance need to be reviewed separately; an arrangement that satisfies California’s fee-splitting rules will not automatically clear the federal ones.
Entities That Fall Outside the Doctrine
A few categories of healthcare organizations are not subject to the standard ownership restrictions. Health and Safety Code Section 1206 exempts clinics operated by federal, state, county, or city government; clinics operated by nonprofits organized exclusively for scientific and charitable purposes; clinics operated by or affiliated with approved medical schools; outpatient departments of licensed hospitals; and clinics run by federally recognized Indian tribes.12California Legislative Information. California Code HSC 1206 – Clinic Exemptions
Federally Qualified Health Centers operate under their own federal governance rules administered by the Health Resources and Services Administration, which require patient-majority boards.13Health Resources & Services Administration. Chapter 20 – Board Composition None of these exemptions open a door for private investors to own a conventional for-profit practice. The exemptions change who can govern specific types of clinics; they do not change the underlying principle that a licensed professional must direct clinical care.
Enforcement Is Active
The doctrine is being enforced. In April 2025, Eli Lilly filed federal lawsuits in the Northern District of California against two telehealth companies, Mochi Health Corp. and Fella Health, alleging that their founders and chief executives controlled affiliated medical groups in violation of the corporate practice prohibition. The complaints described business structures in which non-physicians exercised effective authority over clinical operations while licensed physicians served as nominal owners.
On the legislative side, AB 3129 would have tightened the corporate practice prohibitions, but Governor Newsom vetoed it. AB 1415, introduced in the current session, revives many of the same provisions and, if passed, would give regulators additional tools to examine arrangements where non-physician entities exercise outsized influence over medical practices.
A non-physician who keeps management fees at fair market value, stays entirely out of clinical decisions, and respects the line between the MSO and the professional corporation can participate legally in California’s healthcare market. One who exercises real control from behind a physician’s name is taking on a risk the state is actively looking for.