California med spa MSO-PC: who owns the practice, who may treat
California treats Botox, filler, and laser work as medicine. Learn who may own the practice, who may hold the syringe, and how to split the studio from the medical corporation.
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A California med spa that offers neuromodulators, fillers, lasers, or other prescription drugs and devices is practicing medicine. Business and Professions Code § 2400 bars a lay company from doing that. The clinical work runs through a medical corporation owned mostly by California-licensed physicians, with no lay shareholders. The brand company runs as an MSO under a management services agreement at fair market value. A lay-owned spa that hires a medical director does not fix the problem. Foundry forms the MSO-PC for $15,000 one-time and matches a California-licensed friendly PC owner for $3,000/mo.
California is a strict state on the CPOM 50-state guide. The state page, California CPOM, covers the statutes. Below is what they mean for an aesthetics studio. For med spas in other states, start at the med spa MSO-PC hub or the New York med spa MSO-PC guide. General information only, not legal advice. Foundry is not a law firm.
Why an injection makes your studio a medical practice
The Medical Board of California med spa guidance is blunt. Using prescription drugs and devices for cosmetic reasons is the practice of medicine. There are no separate, lighter rules for aesthetics. Informed consent, delegation, confidentiality, and medical records rules all apply, and they apply to the physician even when the title is "medical director."
That puts the injection room, the laser room, and any prescribing inside the medical corporation. Facials and retail skin care can stay with the brand company. The test is what touches the patient as medicine, not what the sign on the door says.
Who may own the medical corporation
The Medical Board's guidance says a majority of a medical corporation's shares must be owned by California-licensed physicians. Other licensed health professionals named in Corporations Code § 13401.5, such as nurses, NPs, and PAs, may own no more than 49%. A lay person may own none.
| Person | Can hold shares in the medical corporation? | Where their equity goes |
|---|---|---|
| California-licensed physician | Yes. Physicians hold the majority | The medical corporation |
| RN, NP, or PA | Yes, as a minority (no more than 49% for all such licensees together) | A minority stake in the medical corporation, or the MSO |
| Lay founder or investor | No | The MSO, which owns the brand, lease, and marketing |
If you are an NP or RN founder, you can lead the business and hold a minority stake. A California physician still holds control of the practice. Foundry matches that physician as your physician PC owner.
The medical director trap
The most common California med spa setup is also the one the Medical Board calls out. A lay-owned spa hires a physician as "medical director" and keeps the patients, the charts, and the card payments. The Board says that physician is aiding and abetting the unlicensed practice of medicine, citing its Precedential Decision No. MBC-2007-01-Q. It also warns against paper-only supervision, where a physician lends a license and never actually oversees the work.
A new title on the same LLC does not change the answer. The fix is the split: a physician-owned medical corporation that employs or contracts the injectors and owns the charts, and an MSO that runs everything else.
Who may inject, fire a laser, and examine the patient
Ownership and delegation are separate files. The delegation papers live in the medical corporation. This is how the Medical Board's med spa guidance describes the roles.
| Task | Who may do it | What the file needs |
|---|---|---|
| Appropriate prior exam before a prescription drug or device | Physician. NPs under standardized procedures and PAs under a delegation agreement may be delegated it. RNs may not. | Exam note in the chart. B&P § 2242 makes prescribing without an appropriate prior exam and a medical indication unprofessional conduct. |
| Injections and laser or other prescription-device treatments | Physician, or an RN, NP, or PA the physician supervises | Written standardized procedures or delegation of services agreement, with training documented |
| Same tasks by a medical assistant or esthetician | Not allowed, whatever the training | Nothing fixes this one. Change who does the work |
| RN work when the physician is off site | Allowed under standardized procedures in a medical setting the physician controls, not a salon the physician does not control | Physician reachable for questions and emergencies |
Scope-of-practice rules for NPs and PAs have changed over the years, and the Board's guidance is not new. Confirm the current rule with the Medical Board, the Board of Registered Nursing, and the Physician Assistant Board before you write protocols.
If investors are involved: SB 351 and AB 1415
When a private equity group or hedge fund is involved with the practice, Health & Safety Code § 1191 (added by SB 351, effective 1 January 2026) bars it from controlling patient records, clinical hiring, payer contract terms, coding and billing, and equipment and supply choices. It voids management-contract clauses that stop providers from competing after they leave or from commenting on quality of care. AB 1415 widens California's notice rules for health care transactions, including some MSO deals. Read our SB 351 and AB 1415 guide before you sign a term sheet.
Where the money goes
Card payments for injections and laser treatments land in the medical corporation's account. The MSO sends the medical corporation an invoice for defined non-clinical work: the lease, front desk, marketing, software, and retail operations. Price that fee at fair market value. Keep a percentage of injectable revenue out of the MSA. California's fee-splitting statute, B&P § 650, sits next to § 2400, and a percentage fee is the pattern that looks most like a split. Run the full MSA red-flag audit on CPOM compliance.
Setup steps for a California med spa
- Write the menu. Mark every service that uses a prescription drug or device. That list is the medical corporation's work.
- Match a California-licensed physician to own the medical corporation ($3,000/mo).
- Form the medical corporation and the MSO and sign an FMV management services agreement. See MSO-PC formation ($15,000).
- Put standardized procedures and delegation agreements in the medical corporation's file, one per role that injects or uses a device.
- Route clinical payments to the medical corporation's bank account before the first patient.
- If an investor is a private equity group or hedge fund, check § 1191 and AB 1415 before closing.
Typical formation timing is 1 to 3 days after the menu, the studios, and the physician match are scoped. Counsel you engage signs the legal documents. Secretary of State filings and payer enrollment run on those agencies' clocks.
Pricing
MSO-PC formation
$15,000One-time. Medical corporation plus MSO, scoped to California and any other states you treat.
Friendly PC owner
$3,000/moA California-licensed physician who owns the medical corporation.
California med spa FAQ
Can a nurse or nurse practitioner own a med spa in California?
Not on their own. The Medical Board says a majority of a medical corporation's shares must be owned by California-licensed physicians, and other licensed professionals such as nurses, NPs, and PAs may hold no more than 49%. A lay founder holds no shares. The founder's equity goes in the MSO.
Can a lay-owned med spa hire a medical director in California?
No. The Medical Board says a physician who acts as medical director of a lay-owned business is aiding and abetting the unlicensed practice of medicine. The fix is a physician-owned medical corporation that holds the clinical work, plus an MSO that runs the studio.
Who can inject Botox or use a laser in a California med spa?
Under the Medical Board's med spa guidance, prescription drugs and devices may be used only by physicians and by RNs, NPs, and PAs working under physician supervision. Medical assistants and estheticians may not. A physician, NP, or PA does the appropriate prior exam first. Confirm current rules with the Medical Board before you open.
Does SB 351 apply to my California med spa?
Section 1191 applies when a private equity group or hedge fund is involved with the practice. It bars those investors from controlling records, clinical hiring, coding, payer terms, and equipment, and it voids certain noncompete and gag clauses in their management contracts. The general California CPOM rule in B&P § 2400 applies to every med spa either way.
How much does Foundry charge for a California med spa MSO-PC?
MSO-PC formation is $15,000 one-time. A friendly PC owner licensed in California is $3,000/mo. Typical formation timing is 1 to 3 days after the menu, studios, and physician match are scoped. Foundry is not a law firm.
Related reading
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