A nurse practitioner cannot be a medical director in California. The role requires a physician’s license under the state’s Corporate Practice of Medicine (CPOM) doctrine, and federal rules impose the same physician-only requirement at skilled nursing facilities, hospice agencies, and other Medicare-participating providers. What an NP can do is own a minority share of a medical corporation, hold full ownership of a management services organization that contracts with one, and practice independently under AB 890. Those are the real levers, and the rest of this article walks through each one.
Why the Medical Director Role Is Closed to NPs
California’s CPOM doctrine comes out of Business and Professions Code Section 2400, which the Medical Board of California reads to mean that unlicensed persons cannot interfere with or influence a physician’s professional judgment.1Medical Board of California. Practice Information A medical director holds ultimate clinical authority: setting care protocols, overseeing treatment decisions, and bearing responsibility when something goes wrong. Exercising that authority is the practice of medicine, so the person in the chair has to hold a physician’s license. An NP holds a registered nursing license with advanced certification, which is not the same credential.2Justia. California Code Business and Professions Code 2400-2417 – Corporations
Federal law closes the same door from a different direction at certain facility types. Skilled nursing facilities that participate in Medicare must designate a physician as medical director to coordinate medical care and oversee resident care policies.3eCFR. 42 CFR 483.70 – Administration Hospice agencies have the same requirement: the medical director must be a doctor of medicine or osteopathy, employed by or under contract with the hospice.4eCFR. 42 CFR 418.102 – Condition of Participation: Medical Director No amount of NP experience satisfies these rules.
Owning Part of a Medical Corporation
California medical practices operate through professional medical corporations. Physicians must hold the majority of shares, and certain other licensed professionals, including registered nurses, can collectively own up to 49 percent.5California Legislative Information. California Corporations Code 13401.5 Because NPs hold an RN license, they qualify. An NP can also sit as an officer or director of the corporation, though the majority of shareholders and directors must still be licensed physicians.6Legal Information Institute. 16 CCR 1343 – Requirements for Professional Corporations
That is meaningful influence over practice operations. It is not the medical director role. Clinical authority stays with the physician majority, and the medical director title stays with a physician.
Owning a Management Services Organization
The structure most NPs use to control the business side of a healthcare operation is a management services organization. An NP can own 100 percent of an MSO. The MSO then contracts with a physician-owned medical corporation to provide non-clinical services: billing, marketing, scheduling, human resources, office space leasing, equipment procurement, IT support.
The split has to be clean. The MSO handles administration, the medical corporation handles medicine. The MSO cannot hire or fire clinical staff, dictate treatment protocols, decide which patients get seen, or make any call that touches patient care. When regulators find that line blurred, they treat the arrangement as an end-run around CPOM. The contract should list exactly which services the MSO delivers and state plainly that clinical authority rests with the medical corporation and its physician medical director.
Getting the Fee Structure Right
How the MSO is paid matters as much as what it does. California’s fee-splitting statute prohibits paying or receiving anything of value for referring patients, but it permits percentage-based fees for non-referral services when the payment matches the value of the services actually provided or the fair rental value of space or equipment the MSO furnishes. Most enforcement fights sit on the line between a percentage that compensates real administrative work and one that functions as a disguised referral fee.
Three fee structures tend to be safer than a straight percentage of the medical corporation’s gross revenue:
- A fixed monthly fee for a defined set of management services, renegotiated annually.
- A per-unit fee tied to a measurable administrative task, such as a dollar amount per claim processed or per square foot of leased space.
- A cost-plus model: the MSO’s actual costs plus a fixed markup that reflects fair market value for the work performed.
If the MSO arrangement touches Medicare or Medicaid patients, it also has to satisfy the federal Anti-Kickback Statute’s safe harbor for personal services and management contracts: a written agreement of at least one year, compensation set in advance at fair market value, and payment terms that do not vary with the volume or value of referrals between the parties.7eCFR. 42 CFR 1001.952 – Exceptions An agreement that clears California’s fee-splitting rule can still fail the federal safe harbor if the compensation formula moves with referral volume.
Independent Practice Under AB 890
AB 890, signed in 2020, created two new NP categories in California that allow practice without physician supervision or standardized procedures. Neither category makes an NP a medical director. What they do is remove the requirement that a physician oversee the NP’s clinical work.
Category 103
A 103 NP can practice independently inside specific organizational settings such as hospitals, clinics, and health systems. Qualifying requires national board certification, educational training that meets Board of Registered Nursing standards with the required clinical hours, and a transition-to-practice period of at least three full-time equivalent years or 4,600 hours.8California Legislative Information. California Business and Professions Code 2837.103 The Board of Registered Nursing is currently certifying 103 NPs.9California Board of Registered Nursing. Assembly Bill 890
Category 104
A 104 NP has broader authority to practice outside those institutional settings. On top of the 103 criteria, a 104 NP must hold at least a master’s degree in nursing or a related clinical field and must have practiced in good standing for an additional three years beyond the transition-to-practice period.10California Legislative Information. California Business and Professions Code 2837.104 The Board of Registered Nursing has indicated it will begin certifying 104 NPs in 2026.9California Board of Registered Nursing. Assembly Bill 890
Either category lets an NP see patients, order tests, diagnose, and prescribe without a supervising physician signing off. It does not change the CPOM analysis. A 104 NP running a practice structured as a medical practice still operates within the medical corporation framework and still needs a physician as medical director.
Leadership Titles an NP Can Actually Hold
Several positions carry real clinical influence without crossing the CPOM line. An NP can serve as a clinical lead or supervising nurse practitioner, overseeing other nursing staff, shaping patient care workflows, and contributing to protocol development. In large health systems, NPs frequently run day-to-day clinical operations under the broader authority of a physician medical director.
Administrative titles are also open. BPC 2408 permits non-licensed persons to hold business titles such as chief executive officer or executive secretary, and an NP who qualifies as a minority shareholder under Corporations Code 13401.5 can serve as a director or officer. In practice, an NP can run the operational side of a medical corporation while a physician handles medical direction, and pairing that with full ownership of an MSO puts a significant portion of the enterprise under NP control.
What Happens If You Ignore the Rule
If an unlicensed person exercises medical director authority, the arrangement can be charged as the unlicensed practice of medicine under BPC 2052: a fine of up to $10,000, up to one year in county jail, or both. A physician who lends their name as a sham medical director while an NP actually runs clinical decisions faces the same penalties for aiding and abetting.11California Legislative Information. California Code Business and Professions Code BPC 2052
The Medical Board of California can also discipline the physician whose license is attached to the practice. Contracts structured in violation of CPOM may be voided. An MSO arrangement that blurs administrative services into clinical control can draw state fee-splitting enforcement and, for any services billed to Medicare or Medicaid, federal Anti-Kickback Statute liability. Before signing into any leadership or ownership role in a California medical practice, have a healthcare attorney review the structure.