California enforces the corporate practice of medicine more strictly than almost any other state. If you are not a licensed physician, you cannot own a medical practice here, and you cannot employ physicians to practise medicine for your company.
That single rule shapes every legitimate California med spa. Here is what it means, what the compliant structure looks like, and where operations go wrong.
The rule
A corporation owned by non-licensed people may not practise medicine or employ physicians to do so. The policy reason is that clinical judgment should belong to a clinician rather than to whoever holds the equity.
California takes this seriously in a way that Florida, for instance, does not — Florida broadly permits non-physician ownership. If you are reading advice written for another state, or operating a structure that works elsewhere, assume it does not transfer.
The compliant structure
Two entities and an agreement.
The professional corporation (PC). Owned by a licensed physician. It is the entity that practises medicine — it employs or contracts the clinicians, holds the patient records, owns the protocols, and makes clinical decisions. California also has ownership rules governing who may hold shares in a professional corporation.
The management services organization (MSO). May be owned by anyone. It provides the non-clinical side: premises, equipment, non-clinical staff, marketing, billing support, technology, administration.
The management services agreement (MSA). Sets out what the MSO provides and what it is paid. This is where structures are won or lost.
What each side may decide
| Decision | Belongs to |
|---|---|
| Whether a patient is a candidate | PC |
| Which treatment, dose, and product | PC |
| Clinical protocols and standing orders | PC |
| Hiring and supervision of clinicians | PC |
| Time spent per patient | PC |
| Patient records custody | PC |
| Premises, equipment, supplies | MSO |
| Non-clinical staffing | MSO |
| Marketing and brand | MSO |
| Billing operations and technology | MSO |
Read that table against your own operation, not your paperwork. The question regulators ask is who actually decides — not who is described as deciding.
The fee is part of the compliance question
Management fees are normally structured as fair market value for services actually delivered. Percentage-of-clinical-revenue arrangements attract fee-splitting scrutiny in California and are one of the first things examined when an arrangement is questioned.
If the MSO’s economics only work when clinical volume rises, the incentive structure is doing something the doctrine exists to prevent.
What changed on January 1, 2026
SB 351 took effect, prohibiting management entities and investors from controlling or interfering with clinical decisions, and giving the Attorney General enforcement authority including injunctions and penalties.
The structure did not change. The tolerance for a structure that exists only on paper did. If your MSA gives the management side control over protocols, staffing, or patient volume, it needs review.
Common structural mistakes
- The operator owns everything. No PC at all — the LLC employs the injectors directly.
- A nominee physician with no involvement. A name on formation documents who has never seen a protocol.
- Records held by the MSO. One of the clearest indicators that the separation is not real.
- Marketing that speaks as the practice. “Our doctors,” “our patients” — from the entity that is not the practice.
- No succession provision. The physician owner exits and nothing governs what happens to the PC.
- Percentage-based management fees. Common historically, harder to defend now.
- Good faith exams treated as paperwork. A qualified provider must actually evaluate the patient before treatment.
Who may treat
Structure does not answer scope. In California, physicians, nurse practitioners, and physician assistants evaluate and authorize within their scope and applicable supervision or practice-authority rules; registered nurses may administer under appropriate orders and protocols; estheticians may not inject. Nurse practitioner practice authority in California has been changing through phased implementation, so verify the current position for your staffing model rather than relying on a summary.
How MDside operates in California
We form and operate the professional corporation, place the physician owner of record and the licensed provider team, write and maintain the protocols inside the PC where they belong, and run the evaluation and prescribing workflow on software we build and own. Your brand, marketing, and commercial operation stay yours.
See what is included, or read what SB 351 changed for MSO agreements.
Frequently asked questions
Can a non-physician own a med spa in California?
Not the entity that practises medicine. A non-physician can own an MSO that provides administrative services to a physician-owned professional corporation.
Can a nurse practitioner own a California med spa?
Ownership rules for professional corporations are specific about who may hold shares, and nurse practitioner authority has been changing through phased implementation. Confirm the current position with California counsel.
Can the MSO be owned by an out-of-state company?
California does not require the management entity to be California-owned — but the professional corporation must be owned by a California-licensed physician, and SB 351’s restrictions on clinical control apply to the management entity wherever it sits.
Can the MSO take a percentage of revenue?
It invites fee-splitting scrutiny in California. Fair market value fees for defined services are the more defensible approach.
What happens if the structure is wrong?
Exposure ranges from unenforceable agreements and fee disgorgement to professional discipline and, since January 2026, Attorney General enforcement under SB 351.
General information about California corporate practice of medicine, not legal advice. California rules are strict and changing. Confirm your structure with healthcare counsel licensed in California.