Forming a Professional Nursing Corporation in California: Legal Requirements, Ownership Rules, and Compliance
California registered nurses, nurse practitioners, certified nurse-midwives, and certified registered nurse anesthetists who wish to practice through a corporate entity must form a professional nursing corporation California law recognizes under the Moscone-Knox Professional Corporation Act. Unlike general business owners who may choose among LLCs, S-corporations, or C-corporations, licensed nursing professionals in this state are restricted to one corporate vehicle for clinical practice: the professional nursing corporation. Understanding the formation requirements, shareholder restrictions, and regulatory obligations that govern this entity is essential before launching or restructuring a nurse-owned practice.
The legal framework for nursing corporations sits at the intersection of the California Corporations Code (§13400 et seq.), the Business and Professions Code (§§2700–2838, known as the Nursing Practice Act), and the regulations of the California Board of Registered Nursing. Each of these bodies of law imposes distinct requirements — from who may hold shares to how the corporation must be named — and noncompliance can result in disciplinary action, corporate dissolution, or personal liability for the individuals involved.
Bay Legal PC represents registered nurses, nurse practitioners, and other advanced practice nurses in forming, structuring, and maintaining professional nursing corporations throughout California. This page explains the statutory framework, ownership rules, AB 890 implications, standardized procedure requirements, and MSO structures relevant to nurse-owned practices operating in corporate form.
Section 1: The Moscone-Knox Professional Corporation Act and Nursing Corporations
Legal Authority for Professional Nursing Corporations Under Corporations Code §13400
The Moscone-Knox Professional Corporation Act, codified at California Corporations Code §§13400–13410, is the exclusive statutory authority under which licensed professionals — including nurses — may incorporate to render professional services. Enacted in 1968, the Act establishes that a professional corporation must be organized under general corporate law but is subject to additional restrictions designed to ensure that licensed professionals, rather than unlicensed business interests, control the delivery of professional services.
For nursing professionals, the Act works in conjunction with Business and Professions Code §2778, which mandates that any corporation through which nursing services are rendered must be a nursing corporation. The name of the corporation must contain the words "nursing" or "registered nursing," along with a corporate designation such as "Inc." or "Corporation" (BPC §2778). California does not permit nurses to practice through a general stock corporation or a limited liability company — Corporations Code §17701.04(e) expressly prohibits LLCs from rendering professional services as defined under the Moscone-Knox Act.
Formation begins with filing Articles of Incorporation with the California Secretary of State. The Articles must include the corporation's compliant name, a purpose statement declaring engagement in the profession of nursing under Corporations Code §13400 et seq., a registered agent for service of process, the initial street address, and the share structure. Following incorporation, the nursing corporation must register with the California Board of Registered Nursing, adopt bylaws, hold an organizational meeting of the board of directors, issue shares, obtain an Employer Identification Number, and elect its tax status.
Section 2: Shareholder Restrictions and the 51% Ownership Rule
Who Can Own Shares in a California Professional Nursing Corporation
Shareholder eligibility is one of the most consequential aspects of professional nursing corporation law. Under Corporations Code §13401.5(f), at least 51% of the issued and outstanding shares of a nursing corporation must be held by licensed registered nurses or nurse practitioners. The number of nurse or nurse practitioner shareholders must be equal to or greater than the number of any other licensed professional shareholders.
The remaining 49% (or fewer) of shares may be held by specific categories of licensed professionals enumerated in §13401.5(f)(1)–(12). These include licensed physicians and surgeons, doctors of podiatric medicine, psychologists, optometrists, marriage and family therapists, licensed clinical social workers, physician assistants, chiropractors, acupuncturists, naturopathic doctors, licensed professional clinical counselors, and licensed midwives. No unlicensed individual — regardless of their role in the business — may hold any ownership interest in the nursing corporation.
These restrictions extend beyond share ownership to governance. Under Corporations Code §13403, the directors and certain officers (president, treasurer) of a nursing corporation must be licensed persons. Only licensed nurses and nurse practitioners may serve as president or treasurer. Other officer positions may be filled by the other licensed professionals permitted as minority shareholders. Violations of these ownership or governance rules can trigger enforcement actions by both the Secretary of State and the Board of Registered Nursing, potentially resulting in involuntary dissolution of the corporation.
Section 3: The Corporate Practice of Nursing Doctrine and AB 890
Corporate Practice of Nursing Compliance and Independent Practice Under AB 890
California's prohibition against the corporate practice of medicine — rooted in Business and Professions Code §2400 and §2052 — has a parallel application in nursing. While the doctrine is most commonly discussed in the context of physician practices (the Corporate Practice of Medicine, or CPOM), the same principles restrict unlicensed entities from employing nurses to render nursing services or from exercising control over clinical nursing decisions. The professional nursing corporation is the compliant vehicle through which nurses may practice in corporate form without violating these restrictions.
A critical development for nurse practitioners came with Assembly Bill 890, signed by Governor Newsom in September 2020 and effective January 1, 2023. AB 890 created two new categories of nurse practitioners who may practice without physician-supervised standardized procedures. The "103 NP" category allows nurse practitioners who meet specific education, national certification, and experience requirements to practice without standardized procedures in group settings such as clinics, health facilities, and community health centers. After three years of 103 NP practice in good standing, a nurse practitioner may apply for "104 NP" certification, which permits independent practice outside of those group settings. The Board of Registered Nursing began accepting 103 NP applications in January 2023, and SB 1451 (Ashby, 2024) further amended the law to address implementation hurdles.
For nursing corporations, AB 890 has significant structural implications. A nursing corporation owned and operated by 103 or 104 NPs may function with reduced or no physician oversight for clinical services within the NP's authorized scope. However, nursing corporations that employ NPs who have not obtained 103 or 104 certification — or that employ RNs performing interdependent functions — must still maintain standardized procedures developed in collaboration with a physician, as required by BPC §2725 and 16 CCR §1474.
Section 4: Standardized Procedures and MSO Structures
Standardized Procedures and Management Service Organizations for Nurse-Owned Practices
Standardized procedures are the regulatory mechanism through which registered nurses and nurse practitioners (other than 103/104 NPs) may perform functions that overlap with the practice of medicine. Authorized under BPC §2725 and governed by 16 CCR §§1474 and 1379, standardized procedures must be developed collaboratively by nursing, medicine, and administration within an organized health care system. Each standardized procedure must be in writing, signed and dated, and must address eleven specific elements: the development and approval method, authorized functions, circumstances for performance, training requirements, competency evaluation, record-keeping of authorized nurses, scope of supervision, communication protocols, setting limitations, patient record-keeping requirements, and periodic review.
For a nursing corporation, the medical director or collaborating physician who participates in developing standardized procedures does not need to be a shareholder. However, the relationship must be documented, and the physician's role must be limited to clinical collaboration — not management or operational control of the nursing corporation. The standardized procedures must be reviewed periodically and updated whenever practice changes warrant revision.
Non-nurse investors and business professionals who wish to participate in the management of a nurse-owned practice without violating ownership restrictions may do so through a Management Service Organization (MSO). An MSO is a separate legal entity — typically an LLC or corporation — that contracts with the nursing corporation to provide administrative, management, and business support services. These services may include billing, marketing, human resources, facilities management, equipment leasing, and information technology. The MSO may not, however, exercise any control over clinical decision-making, hiring or firing of clinical staff based on clinical performance, or the content of standardized procedures. The management services agreement between the MSO and the nursing corporation must be structured at fair market value, and the MSO's administrative authority must be clearly delineated from the nursing corporation's clinical authority. SB 351, effective January 1, 2026, further codifies restrictions on private equity groups and hedge funds that operate through MSO structures, expressly prohibiting interference with the professional judgment of licensed health care providers.
Steps / HowTo Section:
Steps to Form a Professional Nursing Corporation in California
- Confirm Eligibility and Ownership Structure — Verify that all proposed shareholders hold active California nursing licenses (RN or NP) and that nurses or nurse practitioners will hold at least 51% of shares. Identify any minority shareholders from the categories permitted under Corporations Code §13401.5(f).
- Draft and File Articles of Incorporation — Prepare Articles of Incorporation that comply with the Moscone-Knox Professional Corporation Act. Include the required purpose statement, a compliant corporate name containing "nursing" or "registered nursing" per BPC §2778, and file with the California Secretary of State using Form ARTS-PC or attorney-drafted articles.
- Register with the Board of Registered Nursing — After incorporation, register the nursing corporation with the California Board of Registered Nursing to ensure compliance with the Nursing Practice Act (BPC §§2700–2838) and obtain any required permits.
- Adopt Bylaws and Hold Organizational Meeting — Draft and adopt bylaws governing the corporation's internal operations, elect the board of directors (who must be licensed persons), appoint officers, and document all actions in corporate minutes.
- Issue Shares and Execute Shareholder Agreements — Issue shares to the founding shareholders in compliance with California and federal securities laws. Execute a shareholder agreement addressing transfer restrictions, buy-sell provisions, and mandatory redemption upon license revocation or death.
- Obtain EIN and Elect Tax Status — Apply for an Employer Identification Number from the IRS. Consult with a tax professional regarding S-corporation versus C-corporation election, considering California's 1.5% minimum franchise tax on S-corporations and the implications for pass-through taxation.
- Establish Standardized Procedures (If Applicable) — If the nursing corporation employs NPs who are not certified as 103 or 104 NPs, or if RNs will perform interdependent functions, develop standardized procedures in collaboration with a physician in accordance with BPC §2725 and 16 CCR §1474.
Bay Legal PC assists registered nurses and nurse practitioners throughout California with the formation and ongoing compliance of professional nursing corporations. Our services include drafting Articles of Incorporation and bylaws, structuring shareholder agreements with mandatory redemption provisions, advising on AB 890 implications for NP-owned practices, developing and reviewing standardized procedures, and structuring MSO arrangements for nurse-owned practices that involve non-nurse management or investors. We serve nursing corporations in all practice settings — primary care, specialty clinics, home health, aesthetic services, and telehealth.
Q: Can a nurse practitioner form an LLC instead of a professional nursing corporation in California?
A: No. California Corporations Code §17701.04(e) expressly prohibits limited liability companies from rendering professional services as defined under the Moscone-Knox Professional Corporation Act (Corp. Code §13400 et seq.). Nurse practitioners and registered nurses who wish to practice through a corporate entity must form a professional nursing corporation. Operating through an LLC, general stock corporation, or any other non-compliant entity exposes the practitioner to disciplinary action by the Board of Registered Nursing and potential personal liability for corporate practice of nursing violations.
Q: What must a California professional nursing corporation include in its name?
A: Under Business and Professions Code §2778, the name must contain the words "nursing" or "registered nursing," along with a corporate designation such as "Corporation," "Inc.," or "Corp." The name must also be distinguishable from all other entities on file with the California Secretary of State and cannot include terms suggesting banking, trust, or government affiliation.
Q: Can a physician or other non-nurse professional own shares in a nursing corporation?
A: Yes, but only as a minority shareholder and only if the individual holds one of the specific licenses listed in Corporations Code §13401.5(f). Licensed physicians and surgeons, podiatrists, psychologists, optometrists, marriage and family therapists, clinical social workers, physician assistants, chiropractors, acupuncturists, naturopathic doctors, professional clinical counselors, and licensed midwives may hold up to 49% of shares collectively. These minority shareholders may not outnumber the nurse and nurse practitioner shareholders.
Q: What does AB 890 mean for nursing corporations in California?
A: Assembly Bill 890, effective January 1, 2023, allows qualified nurse practitioners to practice without standardized procedures in certain settings. NPs who obtain "103 NP" certification from the Board of Registered Nursing may practice in group settings (clinics, health facilities, community health centers) without physician-supervised standardized procedures. After three years, they may seek "104 NP" certification for broader independent practice. For nursing corporations, this means that a practice staffed entirely by 103 or 104 NPs may operate with significantly reduced or no physician oversight for clinical services within the NP scope of practice. SB 1451 (2024) further clarified implementation requirements.
Q: How can a non-nurse investor participate in a nursing corporation's business without violating ownership restrictions?
A: Through a Management Service Organization (MSO). An MSO is a separate entity that provides administrative and business services — billing, marketing, HR, facilities, IT — to the nursing corporation under a management services agreement. The MSO cannot hold shares in the nursing corporation, control clinical decisions, or interfere with standardized procedures. Compensation under the MSO agreement must reflect fair market value for services actually rendered. SB 351 (effective January 1, 2026) imposes additional restrictions on private equity groups and hedge funds operating through MSO structures.
Q: What are standardized procedures, and does every nursing corporation need them?
A: Standardized procedures are written protocols, developed collaboratively by nursing, medicine, and administration, that authorize RNs and NPs to perform functions overlapping with the practice of medicine (BPC §2725; 16 CCR §1474). Not every nursing corporation needs them — if the practice is staffed exclusively by NPs holding 103 or 104 NP certification under AB 890, those NPs may practice without standardized procedures. However, any nursing corporation employing RNs performing interdependent functions or NPs without 103/104 certification must have current, compliant standardized procedures.
Q: What happens if a shareholder of a nursing corporation loses their professional license?
A: The shareholder must divest their shares. The shareholder agreement should contain mandatory redemption provisions requiring the corporation to repurchase shares upon license suspension, revocation, or surrender. If the corporation fails to effect a timely redemption, it risks falling out of compliance with Corp. Code §13401.5(f), which could trigger enforcement action by the Board of Registered Nursing or the Secretary of State.
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