Quick answer. California medical spas can only be owned by a California-licensed physician or a Professional Corporation that is at least 51 percent owned by California-licensed physicians, per Corporations Code §13401.5. Up to 49 percent of the PC may be owned by allied licensees on the §13401.5 list (registered nurses, nurse practitioners, physician assistants, chiropractors, podiatrists, optometrists, psychologists, and a few others), and the count of allied owners cannot exceed the count of physician owners. Non-licensed individuals, business investors, and private equity funds cannot own the clinical entity. They can participate only through a separate Management Services Organization at fair market value. California Business and Professions Code §2400 and Corporations Code §17701.04 together close every common workaround: LLCs, general corporations, and lay-owned partnerships are all prohibited from owning medical practices.
Who can legally own a medical spa in California?
Three categories. First, a California-licensed physician operating as a sole proprietor (allowed, though rarely used because of liability exposure). Second, a Professional Corporation under Moscone-Knox owned at least 51 percent by California-licensed physicians and surgeons. Third, a multi-owner PC where physicians hold at least 51 percent and allied licensees on the §13401.5 list hold up to 49 percent, with the count of allied owners not exceeding the count of physician owners. Outside these three structures, no one can own a California medical spa.
Can a non-physician own a medical spa in California?
Not the clinical entity. Under California Business and Professions Code §2400, a corporation or non-licensed individual has no professional right or power to practice medicine. A non-physician can own a Management Services Organization that provides administrative support to a physician-owned PC under a Management Services Agreement. The MSO can be wholly owned by non-physicians. The MSO cannot make clinical decisions, hire or fire physicians for clinical reasons, control medical records, or share in clinical revenue without fair market value documentation. The MSO arrangement is the only legal path for non-physician capital.
Can a nurse or nurse practitioner own a medical spa in California?
Partially. A nurse practitioner, registered nurse, or physician assistant can own a minority interest of up to 49 percent in a California medical PC under Corporations Code §13401.5. They cannot hold a majority. Nurse-only ownership of a medical spa, even with a paid 'medical director' physician hired on the side, is the most-enforced violation by the California Medical Board. The Medical Board has stated this position in its published Bottom Line: Medical Spas guidance: nurses cannot set up a medical practice in a salon and hire a supervising physician. Doing so aids the unlicensed practice of medicine under BPC §2264.
Can private equity own a California medical spa?
Only through an MSO. Private equity funds, family offices, and corporate investors cannot own equity in the clinical PC. They can own the MSO entity that the PC contracts with. This is the structure most PE-backed med spa platforms use. The PE-owned MSO charges the PC a fair market value management fee (documented annually). The MSO cannot exercise clinical control. The PE fund cannot have any direct power to terminate physicians for clinical reasons, set clinical protocols, or take a percentage of clinical revenue without FMV support. The CPOM line is bright. The structure works if it is drafted and operated tightly.
Why does California prohibit non-physician ownership of medical practices?
The policy rationale traces back to People v. Pacific Health Corp., 12 Cal.2d 156 (1938). The California Supreme Court held that allowing a general business corporation to practice medicine would let commercial interests interfere with physician judgment, drive volume over quality, and prioritize shareholder returns over patient outcomes. The Medical Board's published position reinforces this. The doctrine exists to keep clinical decisions in the hands of people who answer to a medical license, who are bound by ethical obligations to put the patient first, and who fall under Medical Board enforcement jurisdiction. A business corporation does not.
Comparison: legal vs illegal medical spa ownership structures in California
| Structure | Legal in California? | Why |
|---|---|---|
| Solo physician-owner | Yes | Direct ownership by licensed physician |
| PC, 100% physician-owned | Yes | Moscone-Knox compliant |
| PC, 60% MD + 40% NP/PA/RN | Yes | Within §13401.5 allied ownership rule |
| PC + non-physician-owned MSO under FMV MSA | Yes | PC retains clinical authority; MSO is admin only |
| LLC owned by physician | No | Corp. Code §17701.04 bars LLCs from medical services |
| General C-corp owned by physician | No | BPC §2400; physicians must use a Moscone-Knox PC |
| 100% RN-owned med spa with paid 'medical director' MD | No | BPC §2400 and §2264; Medical Board enforcement priority |
| PE fund owning 51% of the clinical entity | No | BPC §2400; non-licensed majority prohibited |
| PE-owned MSO with admin-only MSA | Yes | MSO does not practice medicine |
What does the Medical Board look for in an ownership audit?
- Articles of incorporation: is the entity a Moscone-Knox PC, or is it an LLC or general corporation?
- Stock ledger: do California-licensed physicians hold at least 51 percent? Are allied owners on the §13401.5 list?
- Statement of Information: are all named directors and officers licensed (except asst. sec/treas)?
- Bylaws: do they vest clinical authority in physician-owners?
- MSA: does it limit the MSO to non-clinical services? Is the fee at FMV?
- Patient records ownership: does the PC control the EHR contract?
- Advertising: does the spa name a licensed supervising physician on its website, intake forms, and ads (BPC §651)?
- Standardized procedures: do they exist, are they specific to each delegated treatment, and do they comply with 16 CCR §1474?
What if the spa has been operating with non-compliant ownership?
It can usually be restructured. The typical fix involves forming a new compliant PC, transferring clinical operations and assets to it, executing a compliant MSA between the PC and a separate MSO, retitling the medical equipment and the EHR contract, updating advertising and intake materials, and filing the corporate changes with the Secretary of State and the Medical Board. Existing patient records transfer to the new PC. The non-compliant entity is wound down or repurposed as the MSO. Done before an enforcement action arrives, the restructure is straightforward. Done in response to a Medical Board inquiry, the firm becomes a defense exercise rather than a clean transition.
Frequently asked questions
Can a non-physician own a medical spa in California?
Not the clinical entity. Under California Business and Professions Code §2400, non-physicians cannot own a medical practice. A non-physician can own a Management Services Organization that supports a physician-owned Professional Corporation through an MSA at fair market value, but the MSO cannot make clinical decisions.
Can a nurse practitioner own a med spa in California?
Only as a minority owner. Under Corporations Code §13401.5, a nurse practitioner can hold up to 49 percent of a California medical Professional Corporation. The majority (at least 51 percent) must be owned by California-licensed physicians and surgeons.
Can two doctors own a medical spa together in California?
Yes. Two California-licensed physicians can co-own a medical Professional Corporation, with combined physician ownership at 100 percent. Adding allied licensees (NPs, PAs, RNs) as minority owners up to 49 percent is also allowed under Corp. Code §13401.5, provided the count of allied owners does not exceed the count of physician owners.
Can private equity invest in a California med spa?
Only through a Management Services Organization. Private equity cannot own equity in the clinical Professional Corporation. PE can own the MSO that services the PC under an admin-only Management Services Agreement at fair market value. This is the standard structure for PE-backed California med spa platforms.
Is a nurse-owned medical spa legal in California?
No. Under the California Medical Board's published guidance and Business and Professions Code §2400 and §2264, a nurse cannot own the clinical entity of a medical spa, even with a paid 'medical director' physician hired separately. The Medical Board has made this arrangement a primary enforcement target.