A nurse practitioner cannot solely own a medical spa in California today, but the question of whether a nurse practitioner can own a medical spa in California has more than one answer depending on the structure you use and the credentials you hold. State law lets an NP hold up to 49 percent of a physician-controlled medical corporation, own 100 percent of a management company that runs the business side, and, starting in 2026, potentially own a medical practice outright as a newly certified independent nurse practitioner under Assembly Bill 890.
Why an NP Can’t Simply Open a Medical Spa
California’s Corporate Practice of Medicine doctrine blocks the straightforward path. Business and Professions Code Section 2400 states that “corporations and other artificial legal entities shall have no professional rights, privileges, or powers.”1California Legislative Information. California Business and Professions Code 2400 Medical decisions have to be made by licensed physicians, not by investors or corporate managers.2Medical Board of California. Practice Information
The Medical Board of California applies this directly to aesthetic practice: “Medical spas are marketing vehicles for medical procedures. If they are offering medical procedures, they must be owned by physicians.”3Medical Board of California. Medical Spas – What You Need to Know Neurotoxin injections, laser treatments, and similar services are medical procedures under California law, so a med spa offering them falls inside the doctrine. An NP cannot form an LLC or a standard corporation and open a medical spa. That prohibition is firm.
What you can do is share ownership of the medical entity within statutory limits, own the business entity that supports it, or wait for the new independent NP category to come online.
Owning Up to 49 Percent of a Medical Corporation
California Corporations Code Section 13401.5 lets certain licensed healthcare professionals hold shares in a professional medical corporation, so long as the total non-physician ownership stays at or below 49 percent.4California Legislative Information. California Corporations Code 13401.5 – Professional Corporations A physician must hold at least 51 percent and keep control of clinical decisions.
The statute lists “registered nurses” among the eligible minority shareholders, not “nurse practitioners” specifically. NPs qualify because RN licensure is a prerequisite to NP certification, so the ownership right flows through the RN license. It’s worth building your corporate documents around that fact: your shareholder eligibility should be identified by RN license number, not NP certification.
Section 13401.5 also caps how many minority shareholders a corporation can carry. The number of non-physician licensed shareholders cannot exceed the number of physicians licensed by the governmental agency regulating the corporation.4California Legislative Information. California Corporations Code 13401.5 – Professional Corporations A single-physician medical spa can therefore take on one NP shareholder, not several.
The Management Services Organization Route
If you want real operational and financial control, the common structure is a two-entity setup. The physician owns the professional medical corporation, which handles everything clinical. You own a separate management services organization (MSO), which handles everything else: marketing, billing, payroll, HR, the lease, equipment procurement. An NP can own 100 percent of the MSO. The MSO provides services to the medical corporation under a written Management Services Agreement and gets paid a fee for doing so.
How that fee is calculated is where structures go wrong. Business and Professions Code Section 650 prohibits paying or receiving compensation as an inducement for patient referrals, and MSO fee arrangements get examined under it. Section 650(b) permits percentage-based payments for non-referral services when the payment is “commensurate with the value of the services furnished,” but percentage-of-revenue arrangements between an MSO and a medical corporation draw scrutiny, and many California healthcare attorneys steer clients away from them entirely. A flat monthly fee tied to the fair market value of the administrative services being provided is the cleaner path.
Penalties for getting Section 650 wrong include misdemeanor or felony exposure and license discipline. Beyond the fee formula, the MSO has to stay on its side of the line. If your management company is picking treatment protocols, deciding clinical staffing, or choosing which procedures the spa offers, you’ve absorbed the medical practice into an unlicensed entity. The Medical Board has specifically warned against arrangements where a physician “simply sign-on, lend their names on paper to a salon or spa, collect ‘up to’ $400 a month, and escape any liability or responsibility for the patients treated by the business.”5Medical Board of California. The Business of Medicine – Medical Spas The physician has to actually run the clinical side.
What AB 890 Changes in 2026
Assembly Bill 890, signed in 2020, created two new NP categories in California, and the second one may open the door to full ownership.
- 103 NP. Practices in a group setting with at least one physician present. Requires national certification from an accredited body, certification by the California Board of Registered Nursing, and at least 4,600 hours (about three full-time years) of direct patient care in California within the five years before applying.6California Board of Registered Nursing. Assembly Bill 890
- 104 NP. Practices independently within the population focus of their national certification, without physician supervision. Requires first practicing as a 103 NP in good standing for at least three years or 4,600 hours. The Board of Registered Nursing has said it will not begin certifying 104 NPs until 2026.6California Board of Registered Nursing. Assembly Bill 890
The 104 NP category is the important one for ownership. The CPOM doctrine restricts ownership of a medical practice to those with independent clinical authority, and once a 104 NP holds that authority within their certified scope, the legal argument for independent medical spa ownership becomes available. Commentators have read the statute this way. What doesn’t exist yet is formal Medical Board guidance on how 104 NP authority interacts with medical spa ownership. The first certifications are still ahead. Anyone pursuing this route early should do so with a California healthcare attorney and a realistic view that some questions will get answered in the process.
The Clinical Rules Don’t Go Away Because You’re an Owner
Ownership doesn’t change the supervision framework for a traditional NP. Business and Professions Code Section 2836.1 requires that NPs furnish drugs or devices only under written standardized procedures developed jointly with a supervising physician. The physician doesn’t have to be in the room, but must have collaborated on the procedures, approved them, and be reachable by phone while the NP is seeing patients.7California Legislative Information. California Business and Professions Code 2836.1
Two rules matter when you’re planning capacity. First, no physician may supervise more than four NPs at once.7California Legislative Information. California Business and Professions Code 2836.1 A spa with several injectors needs enough physician coverage to stay under that ratio, or the NPs lose the authority for the procedures they’re performing. Second, before an NP administers a prescriptive drug or device to a new patient, the physician must perform an “appropriate prior examination” personally; that exam cannot be delegated.5Medical Board of California. The Business of Medicine – Medical Spas For a med spa, that means new patients see the physician before an NP does the first injectable or laser treatment.
The physician also has to own the clinical decisions the Medical Board treats as indicators of who really controls the practice: treatment protocols, staff competency, third-party payer parameters, equipment selection, and ownership of patient medical records.2Medical Board of California. Practice Information If you own the MSO, those decisions still can’t sit with you.
Liability When You’re Both a Provider and an Owner
Owning a piece of a medical spa raises your exposure. You’re accountable for your own clinical work and, as an owner, potentially for business decisions that touch patient safety. Professional liability insurance isn’t required by law for NPs in California, but operating a med spa without it is reckless, and most collaborating physicians and medical corporations require coverage as a condition of the arrangement.
Standard policy limits for NPs in aesthetic practice run around $1 million per occurrence and $3 million aggregate; some contracts in metropolitan areas require higher. Premiums for aesthetics and independent AB 890 practice tend to be higher than for primary care. Before you buy a policy, confirm in writing that it covers the specific procedures you’ll perform, including injectables and lasers. And if you’re planning to be an early 104 NP owner, remember that independent authority also means you carry the clinical liability alone; there’s no supervising physician absorbing part of it.
Which Structure Fits Your Situation
For most NPs right now, the workable answer is the combined structure: up to 49 percent of a professional medical corporation held through your RN license, and 100 percent ownership of an MSO that provides administrative services to the corporation under a flat-fee agreement. The physician holds 51 percent or more of the medical corporation and keeps genuine clinical control. That structure has a track record and holds up when built carefully.
If you’re on the AB 890 path and expect to qualify for 104 NP certification once it opens in 2026, independent ownership may be within reach, but you’ll be operating in an area the Medical Board has not yet formally addressed. Either route calls for a California healthcare attorney rather than a template, because the difference between a compliant structure and a “rent-a-license” arrangement is often in details the paperwork alone won’t show.