Medical director arrangements for California med spas

A paid medical director does not make a lay-owned med spa legal

No. In California a lay-owned business that hires a physician as its medical director is still practising medicine without a license, and the physician can be disciplined for helping it.

This is the arrangement most often pitched to physicians: a monthly fee to lend a name to a spa that someone else owns. The Medical Board's guidance calls the practice of lay-owned businesses hiring medical directors prohibited, and states that a physician acting as medical director of a lay-owned business is aiding and abetting the unlicensed practice of medicine. It cites its own precedential decision, MBC 2007-01-Q, as authority.

The title is the problem, not the fix. A medical director supervises clinical work inside a practice. A lay business cannot own the practice being supervised, so there is nothing lawful for the director to direct.

The Medical Board of California states that a physician who acts as medical director of a lay-owned business is aiding and abetting the unlicensed practice of medicine. — Medical Board of California, retrieved 2026-09-27

How California's 2012 law targets the medical director model directly

Since 2013, a lay-owned business offering elective cosmetic procedures that contracts with a physician to provide them commits a fraud offence under the Penal Code.

Business and Professions Code 2417.5 was added by AB 1548 in 2012 and took effect on 1 January 2013. It applies to a business that offers outpatient elective cosmetic medical procedures, is owned or operated in violation of section 2400, and contracts with or employs a physician to facilitate those procedures. Such a business is guilty of violating paragraph (6) of subdivision (a) of Penal Code section 550, the false-claims provision.

The statute defines the procedures it covers as treatments performed to alter or reshape normal structures of the body solely to improve appearance. Neurotoxin, dermal filler and aesthetic laser work fall squarely inside that description.

B&P 2417.5B&P 2417.5 makes a lay-owned business that contracts with a physician to provide elective cosmetic procedures guilty of violating Penal Code section 550(a)(6). — California Legislative Information, retrieved 2026-09-27

AB 1548The Board of Registered Nursing records that AB 1548 was approved on 17 July 2012 and increased the penalties for illegally owning and operating a medical spa. — California Board of Registered Nursing, retrieved 2026-09-27

What supervising a nurse injector actually requires of the physician

Supervision in a California med spa means the physician directs, oversees and evaluates the delegated work, is immediately reachable, and has examined the patient first.

The Medical Board's consumer page says the supervising physician does not have to be on site but must be immediately reachable. The Board's longer guidance adds that the law has no statutory definition of supervision, so the plain meaning applies: to oversee, direct, inspect, guide and evaluate. A physician who does none of that is not supervising and is in violation of the law.

The guidance also places responsibility for the standardized procedures on the physician, including documenting the training and competence of each nurse and setting a method of initial and continuing evaluation. The detail of who may do which treatment is on the treatment roles page.

The Medical Board states that a physician supervising nurses or physician assistants in a med spa does not have to be on site but must be immediately reachable. — Medical Board of California, retrieved 2026-09-27

The Medical Board's guidance describes paper-only supervision, or rent-a-license arrangements, as one of the illegal business models in cosmetic medicine. — Medical Board of California, retrieved 2026-09-27

Physician assistant supervision has its own numerical cap

A California physician may supervise no more than eight physician assistants at any one time, and that cap applies in a cosmetic practice like any other.

Business and Professions Code 3516 sets the limit. For a med spa planning several locations, the cap matters sooner than expected: one physician owner with three sites and three PAs at each is already over it.

The Medical Board's guidance also notes that a physician assistant may only be delegated tasks within the supervising physician's own customary practice. A physician who has never practised cosmetic medicine is poorly placed to supervise a PA doing it, which is one more reason the supervising role cannot be a name on a contract.

8Under B&P 3516(b), a physician and surgeon may not supervise more than eight physician assistants at any one time. — California Legislative Information, retrieved 2026-09-27

The physician remains responsible for complications and emergencies

Whoever holds the syringe, the patient in a California med spa is the physician's patient, and complications and emergencies are the physician's responsibility.

The Medical Board's guidance states that physicians who perform or delegate treatments are responsible for their patients' care and, as supervisors, must ensure back-up systems and emergency plans are in place. It also assigns informed consent to the physician: the patient must be told the nature of the treatment, its risks and expected benefits, and the alternatives, including no treatment.

A physician considering an offer should read the arrangement as assuming full clinical liability for every patient treated under it. Insurance and workplace safety covers the related employer obligations.

The Medical Board states that physicians who perform or delegate treatments must ensure back-up systems and emergency plans are in place. — Medical Board of California, retrieved 2026-09-27

The lawful alternative is physician ownership with a management company

If a lay founder wants to be involved, the lawful route is a physician-owned practice that contracts with a separate management company for non-clinical services.

That model has its own limits. The Medical Board's guidance names management arrangements that give a lay entity control over medical records, hiring and firing of clinical staff, coding and billing decisions, or the selection of equipment and drugs as violations. The MSO page walks through what a management company may and may not control, and who can own a med spa covers the equity side.

Before accepting any medical director offer, ask one question: who owns the practice? If the answer is not a physician or a physician-majority medical corporation, decline it.

The Medical Board's guidance names lay control of medical records, clinical hiring and firing, coding and billing, or equipment and drug selection as violations of the law. — Medical Board of California, retrieved 2026-09-27

Questions