Key Takeaways

• The Corporate Practice of Medicine (CPOM) doctrine is California’s prohibition on non-physicians owning medical practices, employing physicians for the purpose of practicing medicine, or controlling clinical decisions. It rests on B&P Code §§ 2052 and 2400 plus more than 85 years of California case law.
• The leading cases are People ex rel. State Board of Medical Examiners v. Pacific Health Corp., 12 Cal. 2d 156 (1938) (foundational ruling), and Conrad v. Medical Board of California, 48 Cal. App. 4th 1038 (1996) (rejecting hospital-district physician employment outside the narrow statutory exceptions). The doctrine traces back further to Painless Parker v. Board of Dental Examiners, 216 Cal. 285 (1932).
• The standard compliant structure for non-physician investment in California healthcare is the friendly-PC + MSO model: a physician-owned professional corporation delivers care; a separately-owned (lay-ownable) management services organization runs the business under a Management Services Agreement.
• SB 351 (Ch. 409, Stats. 2025) and AB 1415 (Ch. 641, Stats. 2025), both effective January 1, 2026, tightened the CPOM rules around private equity and hedge fund involvement in physician and dental practices and added MSOs to the OHCA pre-transaction notice regime.
• CPOM violations can trigger licensing-board discipline, criminal exposure under § 2052 (unlicensed practice) and § 2264 (aiding and abetting), contract voidability, and (post-SB 351) AG enforcement with injunctive remedies and attorney’s fees.

What the Corporate Practice of Medicine Doctrine Actually Is

California’s CPOM doctrine is the rule that lay corporations cannot practice medicine — and cannot employ physicians for the purpose of practicing medicine. The rationale is a century old: clinical decisions should be made by licensed clinicians acting on their professional judgment, not by lay owners with financial motives that may conflict with patient welfare.

The doctrine has four operational consequences:

1. Only licensed physicians (and a limited set of allied professionals) can own a California medical corporation. Lay investors, MBAs, and non-physician operators cannot hold equity in the clinical entity.
2. Lay corporations cannot employ physicians to deliver patient care.
3. Non-physicians cannot exercise clinical control — over diagnosis, treatment plans, prescribing, referrals, panel size, hours, or clinical hiring decisions.
4. Patient medical records belong to the physician-led practice, not to any lay entity providing administrative services.

The doctrine isn’t unique to California. About 33 states recognize some form of CPOM, with varying intensity. California’s version is among the strictest in the country.

If you’re a non-physician investor, operator, or entrepreneur looking at California healthcare, CPOM is the rule that defines what’s possible. If you’re a physician being approached by an MSO, an investor, or a corporate partner, CPOM is the rule that protects your license and your practice. Either way, the conversation starts with this doctrine. Bay Legal, PC counsels physicians, investors, and healthcare operators on CPOM compliance, MSO structuring, and SB 351 / AB 1415 implementation across California. Call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

The Statutory Foundation

Three California statutes do the heavy lifting:

B&P Code § 2052 — The Unlicensed Practice Prohibition

“Notwithstanding Section 146, any person who practices or attempts to practice, or who advertises or holds himself or herself out as practicing, any system or mode of treating the sick or afflicted in this state, or who diagnoses, treats, operates for, or prescribes for any ailment, blemish, deformity, disease, disfigurement, disorder, injury, or other physical or mental condition of any person, without having at the time of so doing a valid, unrevoked, or unsuspended certificate as provided in this chapter or without being authorized to perform that act pursuant to a certificate obtained in accordance with some other provision of law is guilty of a public offense, punishable by a fine not exceeding ten thousand dollars ($10,000), by imprisonment pursuant to subdivision (h) of Section 1170 of the Penal Code, by imprisonment in a county jail not exceeding one year, or by both the fine and either imprisonment.”

In short: practicing medicine without a license is a public offense, with both criminal and civil consequences. Section 2052 reaches not only individuals practicing without licensure but also corporations that purport to deliver medical services without satisfying California’s professional corporation framework. The statutory fine and imprisonment ranges in § 2052 are updated by the Legislature from time to time; check the current statutory text for the exact figures in effect at the time of any enforcement action.

B&P Code § 2400 — The Corporate Limitation

“Corporations and other artificial legal entities shall have no professional rights, privileges, or powers.”

Section 2400 is the doctrinal anchor. A corporation, by virtue of being a corporation, has no professional rights to practice medicine. The Medical Board may issue regulations authorizing the employment of licensees on a salary basis by licensed charitable institutions, foundations, or clinics where no charge is made for professional services — a narrow exception that doesn’t reach typical commercial healthcare operations.

The Moscone-Knox Professional Corporation Act (Cal. Corp. Code §§ 13400–13410) provides the only generally available mechanism to operate a medical practice through a corporation — and it requires that the corporation be physician-owned and registered as a medical corporation.

B&P Code § 2264 — Aiding and Abetting

“The employing, directly or indirectly, the procuring, or any unlicensed person to engage in the practice of medicine for which a license is required under this chapter, or the aiding or abetting of any unlicensed person to engage in such unlicensed practice, constitutes unprofessional conduct.”

Section 2264 captures the people on the other side of a CPOM violation — physicians who lend their licenses to lay-controlled operations, or lay operators who direct unlicensed personnel to perform medical acts. Both face professional discipline; physicians can also face license suspension or revocation.

The Foundational Cases

Three California decisions define CPOM’s contours:

Painless Parker v. Board of Dental Examiners, 216 Cal. 285 (1932)

The earliest of the trio. The California Supreme Court ruled that a dental practice operating under a corporate trade name, with the corporation employing dentists and directing the practice, violated California’s dental practice laws. The court framed the principle in terms that would carry forward to medicine: professional services have to be rendered by licensed professionals, not by corporations directing licensed employees.

People ex rel. State Board of Medical Examiners v. Pacific Health Corp., 12 Cal. 2d 156 (1938)

The foundational CPOM decision. Pacific Health was a lay corporation that sold prepaid medical services to subscribers and employed physicians to deliver care. The Supreme Court held that the corporation was engaged in the practice of medicine and that the statutory prohibition reached corporate practice as well as individual unlicensed practice. The court emphasized the dangers of “the interposition of an unlicensed middleman” between physician and patient and the legislative determination that medicine should be practiced only by licensed natural persons subject to professional discipline.

Pacific Health is the case every CPOM analysis traces back to. Its core holding — that corporations cannot practice medicine in California — has survived 80+ years of changes in healthcare delivery and structure.

Conrad v. Medical Board of California, 48 Cal. App. 4th 1038 (1996)

The most recent of the major California CPOM decisions. A hospital district and nine of its employed physicians challenged the Medical Board’s position that the district’s physician-employment contracts violated CPOM. The hospital district argued that Health and Safety Code § 32129’s “notwithstanding the Medical Practice Act” language created an implied exception for hospital-district employment of physicians.

The Court of Appeal disagreed. Section 32129 didn’t expand a hospital district’s ability to employ physicians for the corporate practice of medicine; it permitted the district to “contract with” physicians, which the court read to mean independent contractor arrangements rather than W-2 employment. The CPOM doctrine survived an attempt to read a statutory carve-out into existence where none was explicit.

Conrad matters because it confirmed in 1996 — well into the modern era of managed care and integrated healthcare delivery — that California’s CPOM doctrine continues to govern. The doctrine isn’t an antique relic; it’s a current operational constraint.

What CPOM Prohibits in Practice

Drawing from the statutes, the cases, and the Medical Board’s published guidance, CPOM prohibits a non-physician (or non-physician-controlled entity) from:

• Owning shares in a medical corporation in California (except for the 49% allied-professional minority permitted under Cal. Corp. Code § 13401.5(a)).
• Employing physicians for the purpose of practicing medicine.
• Controlling clinical decisions — diagnostic tests, treatment plans, prescriptions, referrals, patient panel size, visit lengths, clinical hours.
• Hiring and firing clinicians based on clinical performance criteria.
• Setting medical staff or credentialing standards.
• Owning patient medical records.
• Billing in its own name for clinical services.
• Setting clinical protocols or standardized procedures.
• Establishing referral patterns that constrain clinical judgment.
• Sharing in fees for clinical services in ways that go beyond fair-market-value compensation for non-clinical services.

What lay entities can do under the friendly-PC + MSO model:

• Own and operate a separate MSO that provides non-clinical management services to the physician-owned PC.
• Provide real estate, equipment, technology, billing systems, marketing, scheduling, finance, HR, and operational infrastructure.
• Receive a management fee under a Management Services Agreement, structured to comply with B&P § 650(b) (fair market value, percentage of revenue or flat fee or cost-plus, all with documented FMV support).
• Set business strategy, market positioning, and growth plans for the operations side of the practice.
• Participate in succession arrangements for physician owners, within the limits of SB 351 and California’s non-compete rules.

The line that CPOM draws is between clinical authority (always physician) and business operations (lay-permissible). The friendly-PC + MSO model is the operational embodiment of that line.

The 2026 Statutes: SB 351 and AB 1415

Two California statutes took effect on January 1, 2026, and tightened the rules around CPOM-related arrangements.

SB 351 (Cortese, Ch. 409, Stats. 2025)

SB 351 codifies CPOM principles specifically in the context of physician and dental practices with private equity (PE) or hedge fund involvement. Key provisions:

• “Hedge fund” and “private equity group” are defined, with carve-outs for hospitals, hospital systems, and public agencies.
• Clinical-control prohibitions. PE groups and hedge funds with stakes in physician or dental practices cannot interfere with a physician’s or dentist’s clinical judgment, including diagnostic test selection, referrals, ultimate patient responsibility, panel size, or clinical hours. They cannot own patient records, make clinical-personnel employment decisions, or set parameters constraining clinical judgment.
• Voided non-compete and non-disparagement clauses. SB 351 voids non-compete and non-disparagement provisions in MSO and asset-purchase agreements between PE/hedge funds and physician or dental practices, with two carve-outs: bona fide sale-of-business non-competes permitted under California law remain valid, and confidentiality clauses protecting material non-public information remain valid (unless they suppress legally required disclosures).
• The California Attorney General can seek injunctive relief, equitable remedies, and attorney’s fees.
• Existing arrangements are not grandfathered. The new restrictions apply to existing as well as new MSAs.

SB 351 by its terms targets physician and dental practices and PE/hedge fund-controlled MSOs. It doesn’t expand to all MSO arrangements, and it doesn’t replace the existing CPOM framework — it adds to it. For PE/hedge fund-backed healthcare investments, SB 351 changes contract drafting in material ways and gives the AG new enforcement tools.

AB 1415 (Bonta, Ch. 641, Stats. 2025)

AB 1415 amends the California Health Care Quality and Affordability Act and expands the Office of Health Care Affordability (OHCA) pre-transaction notice regime:

• New “noticing entities.” MSOs, PE groups, hedge funds, newly created entities formed for healthcare transactions, and certain other entities are added to the list of entities required to file pre-transaction notices with OHCA.
• 90-day advance notice. Noticing entities must give at least 90 days’ advance written notice before a covered material change transaction.
• MSO data reporting. Under new H&S Code § 127501.5, MSOs must submit data and information to OHCA under regulations to be promulgated.

OHCA’s implementing regulations continue to develop; confirm current status at hcai.ca.gov before relying on specific procedural steps.

For CPOM-related arrangements, AB 1415’s practical impact is on deal timing. Acquisitions of MSO-supported practices, sales of MSOs, and certain internal restructurings now have to be planned around the 90-day OHCA notice window.

SB 351 and AB 1415 didn’t change the core CPOM rules, but they changed how PE-backed MSO arrangements get drafted, governed, and transacted. Existing MSAs need review. New MSAs need different drafting. Bay Legal, PC counsels physicians, investors, and healthcare operators on SB 351 / AB 1415 implementation and CPOM-compliant structure across California. Call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

CPOM and Specific Practice Areas

The CPOM doctrine’s general rules apply across California healthcare, but specific practice contexts deserve attention:

Med Spas

The Medical Board has been particularly active in med-spa CPOM enforcement. Botox, fillers, lasers, and similar treatments are the practice of medicine. The clinical entity has to be a physician-owned medical corporation. “Paper medical director” arrangements — physicians paid a stipend who don’t actually exercise clinical oversight — are a leading enforcement target. We cover med spa CPOM compliance in detail elsewhere.

IV Hydration

Same analysis. IV therapy involves prescription drugs and an invasive procedure — the practice of medicine. Nurse-owned IV clinics that hire a physician medical director cannot circumvent CPOM regardless of how the practice is branded.

Telehealth

CPOM applies identically to virtual practice. A telehealth platform that employs physicians directly through a lay corporation violates CPOM in the same way an in-person practice would. The compliant structure is the same friendly-PC + MSO model.

Hospital Districts

Per Conrad, hospital districts cannot employ physicians for the practice of medicine outside the narrow statutory exceptions. Many California hospital districts use foundation models or contracting arrangements rather than direct employment.

Federally Qualified Health Centers (FQHCs)

FQHCs operate under federal law that authorizes their structure. They’re effectively exempt from CPOM for the services they provide as FQHCs.

Charitable, Foundation, and University Settings

Section 2400’s text contains a narrow exception for “licensed charitable institutions, foundations, or clinics” where no charge for professional services is made. Universities and academic medical centers have additional statutory frameworks. The exceptions are narrow and don’t extend to typical commercial healthcare.

CPOM Violations: What Actually Happens

The consequences of a CPOM violation can hit on multiple fronts simultaneously:

1. Licensing-board discipline. The Medical Board, BRN, Dental Board, Chiropractic Board, or other healing-arts board can take action against the physician (or other licensee) involved in the non-compliant arrangement. Penalties range from citation and fine to probation, suspension, and revocation.
2. Criminal exposure under B&P § 2052. Unlicensed practice of medicine is a public offense. The fine can reach $10,000, and imprisonment up to one year (county jail) or imprisonment under Penal Code § 1170(h) is on the table.
3. Aiding and abetting charges under B&P § 2264. The physician who lends their name or license to a non-compliant operation faces professional discipline.
4. Contract voidability. Agreements that violate CPOM are unenforceable. Patient contracts, payor contracts, and MSO arrangements that depend on the non-compliant structure can collapse.
5. AG enforcement (post-SB 351). For PE/hedge fund-controlled physician or dental practice arrangements, the Attorney General can seek injunctive relief, equitable remedies, and attorney’s fees.
6. Civil exposure. Patients harmed by clinical decisions made in CPOM-violating arrangements have potential claims; payors have recovery rights for amounts paid for services delivered through non-compliant entities.
7. Federal program exclusion. Where federal payors are involved, CPOM violations frequently overlap with federal AKS or Stark exposure, which can lead to program exclusion and False Claims Act liability.

Common Pitfalls and Red Flags

1. Lay-owned LLC or corporation directly delivering medical services.
2. Non-physician shareholder holding majority equity in a medical corporation.
3. MSO controlling clinical decisions — hiring, firing, panel size, hours, treatment protocols — through MSA terms or operational reality.
4. Paper medical director — physician paid a stipend who doesn’t actually exercise clinical oversight.
5. MSO billing in its own name for clinical services.
6. Records owned by the MSO, not the PC.
7. Succession arrangements that effectively let the MSO replace the physician owner without cause (post-SB 351 these may be void in PE/hedge fund contexts).
8. Cross-state telehealth platforms that ignore California’s separate PC requirement.
9. Hospital district direct employment of physicians outside § 32129’s limited contracting authority.
10. Missed OHCA notice under AB 1415 on a covered MSO transaction.

Talk to a California CPOM Attorney

The Corporate Practice of Medicine doctrine is one of the central frameworks in California healthcare business law. It defines who can own a medical practice, how non-physician capital can participate in healthcare economics, and what the operational lines look like between business management and clinical care. The doctrine’s text is brief; its application is fact-intensive; and the 2026 changes added new enforcement tools and contract restrictions that practices and investors are still working through.

If you’re a physician evaluating an MSO partnership, an investor structuring a healthcare acquisition, an operator building a multi-location practice, or a California clinic owner reviewing your existing arrangements against SB 351 and AB 1415, attorneys at Bay Legal, PC counsel on CPOM compliance, MSO structuring, MSA drafting, and SB 351 / AB 1415 implementation across the state. Call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

Frequently Asked Questions

What is California’s Corporate Practice of Medicine doctrine?

California’s CPOM doctrine prohibits non-physicians from owning medical practices, employing physicians for the purpose of practicing medicine, or controlling clinical decisions. It’s grounded in B&P Code § 2400 (corporations have no professional rights to practice medicine), § 2052 (unlicensed practice of medicine), and California case law including People ex rel. State Board of Medical Examiners v. Pacific Health Corp., 12 Cal. 2d 156 (1938), and Conrad v. Medical Board of California, 48 Cal. App. 4th 1038 (1996).

Can a non-physician own a medical practice in California?

Not the clinical entity. California requires medical practices to be structured as physician-owned medical corporations under Cal. Corp. Code § 13401.5(a), with at least 51% physician ownership. Non-physician investors and operators can participate through a separate MSO that contracts with the physician-owned PC under a Management Services Agreement. The MSO can handle business operations; the PC delivers all clinical services.

What is the friendly-PC + MSO model in California?

The friendly-PC + MSO model is the standard CPOM-compliant structure for non-physician capital participation in California healthcare. A licensed physician owns the professional corporation that delivers clinical services. A separately-owned management services organization (which can be lay-owned, including by PE/hedge funds) provides administrative and operational services to the PC under a written MSA. The structure preserves clinical authority to the physician while letting outside capital participate in the business side.

What did SB 351 change about California CPOM in 2026?

SB 351 (effective January 1, 2026) codifies CPOM principles in the context of physician and dental practices with private equity or hedge fund involvement. It prohibits PE/hedge fund interference with clinical decisions, voids non-compete and non-disparagement clauses in MSO and asset-purchase agreements between PE/hedge funds and physician or dental practices (with narrow carve-outs), and authorizes the California Attorney General to seek injunctive relief, equitable remedies, and attorney’s fees. Existing arrangements are not grandfathered.

What are the penalties for violating California’s CPOM doctrine?

Penalties can include licensing-board discipline (Medical Board, BRN, Dental Board, etc.) against any licensee involved, criminal exposure under B&P § 2052 (statutory fine and imprisonment under § 2052’s current terms), aiding-and-abetting charges under § 2264, contract voidability for the non-compliant arrangement, AG enforcement under SB 351 for PE/hedge fund contexts, civil exposure to patients and payors, and (where federal payors are involved) federal AKS or Stark exposure with program exclusion and False Claims Act consequences.

This article provides general information about California law and is not legal, tax, or financial advice. Reading this article, contacting Bay Legal, PC, or sending information through baylegal.com does not create an attorney-client relationship. The information here focuses on California law and may not reflect the law of other jurisdictions. Statutes, regulations, agency guidance, and case law change; this article reflects the authors’ understanding as of the date of publication and may not reflect later developments. For advice about your specific situation, consult a licensed California attorney.