Who can own a med spa in California

A med spa offering medical treatments must be physician-owned

A California med spa that performs injectables, lasers or other medical procedures must be owned by physicians, because the state treats those procedures as the practice of medicine.

The Medical Board of California puts it without qualification: a med spa is a marketing vehicle for medical procedures, and if it offers them it must be owned by physicians. The label on the door does not change the analysis. A room that looks like a day spa but offers neurotoxin injections is, legally, a medical office.

The rule comes from the corporate practice of medicine doctrine. The Medical Practice Act provides that corporations and other artificial legal entities have no professional rights, privileges or powers, which means a business entity cannot practice medicine on its own account. Only a licensed person can, or an entity the law specifically authorises, and the professional medical corporation is the main one.

The Medical Board of California states that medical spas offering medical procedures must be owned by physicians. — Medical Board of California, retrieved 2026-09-27

B&P 2400Business and Professions Code section 2400 provides that corporations and other artificial legal entities have no professional rights, privileges or powers. — California Legislative Information, retrieved 2026-09-27

How the 51 percent physician share works in a medical corporation

A medical corporation may have minority shareholders who hold certain other health licenses, but together they may own no more than 49 percent of the shares.

The Moscone-Knox Professional Corporation Act lists who those minority owners can be. For a medical corporation the list includes registered nurses, physician assistants, podiatrists, psychologists, optometrists, chiropractors, acupuncturists, naturopathic doctors, physical and occupational therapists, pharmacists, midwives and several licensed counsellors and therapists.

The practical consequence for a nurse injector or physician assistant who wants equity is that a partnership with a physician is possible, but the physician side must hold the majority. The Board of Registered Nursing describes the same rule from its side: a medical business must be owned by a physician, or at least 51 percent by a physician with the remainder held by a licensed practitioner such as a nurse.

49 percentLicensed persons other than physicians may own shares in a medical corporation only if their shares together do not exceed 49 percent of the total. — California Legislative Information, retrieved 2026-09-27

Registered nurses and licensed physician assistants are among the licensees Corporations Code 13401.5 permits as minority shareholders of a medical corporation. — California Legislative Information, retrieved 2026-09-27

51 percentThe Board of Registered Nursing states that medical businesses must be owned by a physician or at least 51 percent by a physician, with the remainder held by a licensed practitioner. — California Board of Registered Nursing, retrieved 2026-09-27

Lay investors and estheticians cannot hold any share of the practice

A person with no qualifying health license cannot own any part of a California medical practice, not even a small minority stake.

The Medical Board's guidance on med spas says so directly: laypersons and lay entities may not own any part of a medical practice. The same guidance notes that no stock in a medical corporation may be owned by a layperson. An esthetician holds a real state license, but it is a cosmetology-side license, not one of the healing-arts licenses the statute lists for medical corporations.

That leaves a lay founder with two lawful paths. One is to own a spa that offers only non-medical services, which means no injectables and no medical lasers. The other is to own a separate company that provides business services to a physician-owned practice, which is the management services model covered on the MSO page. Both keep the lay owner outside the clinical practice.

The Medical Board's med spa guidance states that laypersons or lay entities may not own any part of a medical practice. — Medical Board of California, retrieved 2026-09-27

A nurse practitioner cannot open a med spa alone in a salon

A nurse practitioner, registered nurse or physician assistant cannot set up an independent cosmetic practice in a salon and hire a physician to supervise it.

The Medical Board's guidance addresses nurses specifically: the law does not allow nurses to set up a practice in a salon, hire a physician supervisor, or perform medical procedures independently. The newer independent nurse practitioner category does not open that door either. A nurse practitioner practising without standardized procedures under Business and Professions Code 2837.103 must do so in one of the listed settings, which include a medical group practice or professional medical corporation, and must first complete a transition to practice of three full-time-equivalent years or 4,600 hours.

For a nurse who wants to own, the realistic structure is a minority stake in a physician-majority medical corporation, with the treatment roles set by each person's license.

The Medical Board's guidance states that the law does not allow nurses to set up a practice in a salon, hire a physician supervisor, or perform medical procedures independently. — Medical Board of California, retrieved 2026-09-27

4,600 hoursA nurse practitioner practising without standardized procedures under B&P 2837.103 must first complete a transition to practice of three full-time-equivalent years or 4,600 hours. — California Legislative Information, retrieved 2026-09-27

What unlawful ownership exposes the owner and the physician to

Unlicensed practice of medicine is a crime in California, and a lay-owned cosmetic business that uses a physician to deliver its treatments faces an additional fraud-based offence.

Business and Professions Code 2052 makes practising medicine without a license punishable by a fine of up to $10,000, imprisonment, or both, and applies the same penalties to anyone who aids or abets it. Section 2417.5, added in 2012, targets the med spa pattern directly: a business offering elective cosmetic procedures that is owned or operated in violation of section 2400, and that contracts with a physician to provide those procedures, is guilty of a violation of Penal Code section 550.

The physician carries separate exposure through the Medical Board, which can discipline a physician who works for a lay-owned spa for unprofessional conduct. The details of that side are on the medical director page.

$10,000Practising medicine without a license in California is punishable by a fine of up to $10,000, imprisonment, or both, under B&P 2052. — California Legislative Information, retrieved 2026-09-27

B&P 2417.5Under B&P 2417.5, a lay-owned business offering elective cosmetic procedures that contracts with a physician to provide them violates Penal Code section 550. — California Legislative Information, retrieved 2026-09-27

When a physician owner leaves, the shares have a deadline

If a shareholder of a medical corporation loses their license or dies, the shares must move to a qualified person within a fixed period, or the corporation risks suspension.

Corporations Code 13407 gives 90 days after a shareholder becomes disqualified, and six months after a shareholder's death, for the shares to be transferred to the corporation, another shareholder or another eligible licensee. For a med spa with one physician owner and a nurse minority owner, this is the scenario to plan for in writing at formation.

A buy-sell agreement that names who buys the physician's shares, and at what price, is what keeps a sudden departure from becoming an ownership violation. Settle it before you sign the lease; the setup guide shows where it fits among the other formation documents.

90 daysA disqualified shareholder's shares in a professional corporation must be transferred within 90 days, and a deceased shareholder's within six months. — California Legislative Information, retrieved 2026-09-27

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