Who Can Own a Med Spa in California?

California treats a medical spa as a medical business — not a spa that happens to offer medical treatments on the side. That distinction determines who can own one, who must supervise and what happens when the ownership structure does not match the services delivered.

The Medical Board of California's medical-spa guidance is the state's clearest public statement on the question. It calls a medical spa a "marketing vehicle for medical procedures." When a med spa offers medical procedures, the Board says those procedures constitute the practice of medicine. Under California law, the practice of medicine must be conducted by or under the control of a licensed physician.

The short answer — California, evidence checked July 17, 2026: A med spa that performs medical procedures must be owned by a physician or by a professional corporation where physicians hold the controlling interest. Non-physician investors may participate in limited structures, but they cannot control the medical side of the business. The answer depends on the services offered, the entity type and whether the arrangement runs afoul of California's corporate practice of medicine doctrine.

This guide explains the ownership rules for California med spas, how to verify a professional's license, what the corporate practice of medicine doctrine means and the ownership structures that comply with state requirements. It is not a legal opinion about any specific clinic or arrangement.

The Medical Board's position on ownership

The Medical Board of California (MBC) regulates physicians and surgeons under the California Business and Professions Code. Its medical-spas page states directly: "When medical procedures are performed, medical spas are medical practices — marketing vehicles for medical procedures. They must be owned by physicians."

That sentence carries legal weight because it reflects the Board's interpretation of Business and Professions Code section 2000 et seq., which vests the Board with authority over the practice of medicine. The Board's position is that a non-physician-owned business cannot lawfully employ a physician to perform medical procedures or direct how those procedures are delivered.

This is not a California-specific invention. Most states restrict who may own or control a medical practice through the corporate practice of medicine doctrine. What varies is how aggressively the rule is enforced and what workarounds — such as management services organizations — are permitted.

The Board's guidance does not define every acceptable ownership model or every service that triggers the requirement. It states a principle: if the service is the practice of medicine, the physician must control the practice.

What counts as the practice of medicine

California defines the practice of medicine broadly. Business and Professions Code section 2035 says a person who engages in an activity that requires a physician's license — including diagnosing, prescribing, treating or performing surgery — is practicing medicine. That includes injections of prescription drugs, laser treatments that alter living tissue, microneedling that penetrates beyond the epidermis and any procedure that requires a medical device cleared or approved by the FDA for prescription use.

Not every service in a med spa qualifies. Facials, nonprescription cosmetic applications and some light-based treatments may fall outside the definition if they use devices that are FDA-cleared for over-the-counter use and do not involve diagnosis or prescription. The dividing line is what the procedure does to the body and whether it requires a physician's judgment to perform safely.

The MBC does not publish an exhaustive list of services that do or do not constitute the practice of medicine. The determination depends on the specific device, substance, technique and professional role involved. A clinic owner should evaluate each service against the statutory definition rather than relying on industry labels.

The corporate practice of medicine doctrine

California's corporate practice of medicine (CPOM) doctrine prohibits a corporation or other business entity from practicing medicine or employing a physician to practice medicine on its behalf. The rule is rooted in the principle that a corporation cannot hold a medical license and that a licensed professional's clinical judgment must not be subject to corporate control.

The Medical Board of California's corporate practice of medicine resource page explains that, under Business and Professions Code sections 2400 and 2401, a corporation or lay person may not engage in the practice of medicine or employ a physician to provide professional services. The prohibition extends to any arrangement where a non-physician directs, controls or profits from a physician's medical practice in a way that could compromise independent clinical judgment.

Several California Attorney General opinions have reinforced this doctrine. A 1998 opinion (88 Ops. Cal. Atty. Gen. 79) held that a non-physician-owned management company could not employ a physician to provide medical services to the public. A 2003 opinion clarified that a licensed physician may contract with a management services organization (MSO) as long as the physician — not the MSO — retains control over all clinical decisions.

The practical consequence for med spa owners is straightforward: a non-physician investor cannot simply hire a physician to provide the medical services and keep the profits. The physician must own the practice or be the controlling force within a permissible professional corporation structure.

Ownership structures that work in California

California law permits several ownership structures for a med spa that offers medical procedures. Each has specific requirements and limitations.

Physician-owned sole proprietorship or professional corporation

A licensed physician may own and operate a med spa as a sole proprietor or through a professional corporation (PC). Under the Moscone-Knox Professional Corporation Act (Business and Professions Code sections 13400–13410), a professional corporation may render professional services — including the practice of medicine — if all shareholders are licensed persons in the same profession. For a medical professional corporation, every shareholder must be a licensed physician and surgeon.

This is the cleanest structure for compliance. The physician owns 100% of the entity, controls all clinical decisions and directly employs or contracts with other providers. No non-physician ownership interest exists to trigger a CPOM challenge.

Professional medical corporation with an MSO

A physician-owned professional corporation may contract with a separate management services organization (MSO) for nonclinical services such as billing, marketing, facilities management and administrative support. The MSO may be owned by non-physicians. The key requirement is that the MSO does not control or interfere with medical decision-making.

The California Attorney General's guidance on MSO arrangements emphasizes that the physician must retain:

• Complete authority over all medical procedures and treatment decisions.
• Control over patient records and medical protocols.
• Independent professional judgment free from MSO direction.
• The ability to terminate the management agreement if the MSO attempts to influence clinical care.

A well-structured MSO arrangement can allow non-physician investors to earn a return on nonclinical services without running afoul of CPOM. The risk is that the arrangement crosses the line into de facto control of the medical practice. The Board evaluates the substance of the relationship, not just the form of the contract.

Medical foundation (nonprofit)

California law permits a limited number of nonprofit medical foundations, authorized under Business and Professions Code section 2406. These entities are typically associated with hospital systems and must meet strict organizational requirements. They are not a practical ownership route for most independent med spa operators.

What does not work

A limited liability company (LLC) owned by a non-physician cannot directly employ a physician to practice medicine in California. An LLC may own a med spa that offers only nonmedical services, but the moment a medical procedure is offered, the entity and ownership structure must comply with physician-ownership requirements.

A publicly traded corporation or private equity fund cannot directly own a medical practice in California. These entities may invest through permissible structures such as MSOs, but they cannot hold an ownership interest in the professional corporation itself or control the clinical side of the business.

How to verify a professional's license in California

California offers two primary public databases for checking whether a professional holds an active, unrestricted license. These databases are useful tools, but each has specific limitations that an owner or patient should understand before drawing conclusions.

MBC License Verification

The Medical Board of California License Verification page allows anyone to search for physicians and allied health professionals including physician assistants, physical therapists, acupuncturists and psychological assistants. The Board's database shows license status (active, expired, revoked, suspended), issue and expiration dates, and disciplinary actions taken by the Board.

What the MBC database does not show: whether a physician owns a particular med spa, whether the physician is the medical director of a specific clinic, the full supervision arrangements for non-physician providers or whether the physician's ownership stake meets the Board's requirements for a medical practice.

CA DCA License Search

The California Department of Consumer Affairs (DCA) License Search covers more than 260 license types across dozens of boards and bureaus, including the Medical Board, the California Board of Registered Nursing, the Dental Board and the Board of Pharmacy. The DCA search aggregates license data from these agencies into a single interface.

The DCA's own description says its records show whether a covered license is current, expired or subject to disciplinary action such as suspension or revocation. It also warns that some fields — including practice addresses — are provided by the licensee and may not be independently verified.

For a med spa owner or patient, the DCA search is a useful starting point for a license-status check. It is not a mechanism for verifying ownership arrangements, supervision structures or compliance with the corporate practice of medicine doctrine. A clean license record does not prove that a business's ownership structure is lawful.

Special rules for registered nurses and nurse practitioners

California law allows registered nurses (RNs) and nurse practitioners (NPs) to perform certain medical-aesthetics procedures under physician supervision. However, the ownership rules differ for these professionals.

A registered nurse may not independently own a med spa that offers medical procedures. The procedures are the practice of medicine, and under the Medical Board's guidance, the practice of medicine must be under physician control. An RN may own a med spa that offers only nonmedical services — such as facials, nonprescription cosmetic applications and relaxation treatments — but cannot independently offer injections, laser treatments or other medical procedures without a physician's supervision and control.

A nurse practitioner operating under a standard protocol pursuant to Business and Professions Code section 2746.51 may perform some medical procedures within their scope. However, the NP cannot own the medical practice in the same way a physician can, because the practice of medicine — including the delegation of medical procedures — must ultimately be controlled by a licensed physician. The NP may be an employee or contractor of the physician-owned practice.

These distinctions matter because some clinic structures attempt to use an NP or PA as the "owner" of the practice while a physician is contracted for supervision. Under California law, that arrangement is unlikely to satisfy the Board's ownership requirement unless the physician holds the controlling ownership interest in the entity that provides the medical services.

What the ownership rules do not tell you

The Medical Board's ownership guidance answers one specific question: who must own the business when medical procedures are performed. It does not answer several related questions that a clinic owner must still resolve:

• What advertising claims are allowed. The FTC separately regulates advertising claims, and California has its own false-advertising statutes enforced by the Attorney General and district attorneys.
• What supervision ratio is required. The Board's guidance on physician supervision of non-physician providers is addressed in other Board resources, including its physician assistant supervision page and its guidance on the use of laser and pulsed-light devices.
• What facility requirements apply. California law may require certain facilities to register as surgical clinics or meet specific building and safety standards.
• What drug-dispensing rules apply. The California Board of Pharmacy regulates the dispensing of prescription drugs, including the authority to dispense from a physician's office.

Each of these questions leads to a different authority. The MBC's ownership position is a starting point, not a comprehensive compliance checklist.

Where ownership questions remain open

Several aspects of California med spa ownership law are not settled by the Board's public guidance. The Board does not publish regulations that define exactly what ownership percentage a physician must hold or what contractual arrangements automatically violate CPOM. Enforcement tends to occur case by case through disciplinary actions, rather than through prospective guidance.

In 2018, the Medical Board issued a cease-and-desist letter to an Irvine med spa for operating without physician ownership. In 2022, the Board filed an accusation against a physician for serving as a medical director for multiple clinics without maintaining adequate oversight. These enforcement actions illustrate how the Board applies its ownership and supervision requirements in practice, but they do not create bright-line rules that cover every fact pattern.

Physician-ownership questions also intersect with Medicare and Medi-Cal billing rules, which separately require that the billing provider be the professional who rendered or directly supervised the service. A nurse practitioner billing under the physician's NPI must meet the supervision standards of both California law and the applicable payer contract.

The bottom line

California treats ownership of a med spa as a question about who controls the practice of medicine — not about who invested the most capital. The Medical Board of California's medical-spa guidance is direct: when medical procedures are performed, the med spa must be owned by physicians.

Non-physician investors are not categorically excluded from participating in a California med spa business. They can invest through a properly structured MSO arrangement that does not interfere with clinical decision-making. They cannot, however, hold a controlling interest in the entity that employs the physicians and provides the medical services.

For anyone evaluating a California med spa — as an owner, investor or patient — the right starting point is to identify what services are offered, what entity owns the practice and whether a licensed physician holds the controlling interest in that entity. The MBC License Verification and DCA License Search can confirm who holds a license, but neither database answers whether the ownership structure itself complies with California law. That determination requires a review of the entity's organizational documents against the Board's guidance and the relevant code provisions.