Who Can Own a Med Spa in Washington? 2026 Rules

There is no corporate practice of medicine statute here — only a 1988 Supreme Court decision, a 2010 one reaffirming it, a professional-entity chapter, an anti-rebate law, and a Department of Health publishing med spa guidance without a licensing regime to administer. Assembling those into a structure is the work. For the scope side — who may hold the syringe once the entity exists — start with who can inject Botox in Washington; the med spa regulations by state reference sets Washington beside Oregon, Idaho, and California.

Washington's Corporate Practice of Medicine Posture: Doctrine Without a Statute

Where the doctrine comes from

Verdict: Washington enforces corporate practice of medicine, on common-law authority. There is no explicit CPOM statute in the Revised Code of Washington. Courts and agencies derive the doctrine from the prohibition on practising medicine without a licence: a corporation cannot hold a medical licence, so it cannot practise medicine, and it cannot do indirectly through employed licensees what it may not do directly.

The anchor case is Morelli v. Ehsan, 110 Wn.2d 555 (1988), where a non-physician and a physician formed a limited partnership to operate a clinic in Everett. The Supreme Court held the agreement illegal as a matter of law and extended the doctrine to prevent an unlicensed person from having any part in owning, maintaining, or operating a business that practises medicine — not merely from treating patients.

Columbia Physical Therapy and the doctrine's modern reaffirmation

Anyone hoping Morelli had quietly aged out should read Columbia Physical Therapy, Inc., P.S. v. Benton Franklin Orthopedic Associates, PLLC, 168 Wn.2d 421 (2010). A physical-therapist-owned corporation sued a physician-owned PLLC employing physical therapists under the corporate practice doctrine, the Professional Service Corporation Act, and the anti-rebate statute. The Supreme Court unanimously affirmed the doctrine remains viable — while holding the multidisciplinary structure lawful, because the Act expressly permits the named health care professions to co-own one entity. Those ownership lists are the safe harbour the court relied on.

How strictly Washington applies it in practice

Washington is strict in doctrine and reactive in enforcement. There is no med spa facility licence, no ownership registry, and no agency proactively auditing who owns what — which is why structures that would never survive a California review have run here for years unexamined. Unexamined is not lawful. Enforcement arrives through other doors: an unlicensed-practice complaint under RCW 18.130.190, discipline for aiding and abetting under RCW 18.130.180(10), a contract held unenforceable, a competitor's Consumer Protection Act claim, or diligence on a sale.

Who Can Own a Washington Med Spa: The Ownership Table

Here is the fast reference; every row is explained below.

Professional Corporations and PLLCs: Who May Hold Shares

RCW 18.100.050 and the same-services rule

Chapter 18.100 RCW, the Professional Service Corporation Act, is the baseline, and the restriction has teeth: no professional corporation organised under it may issue capital stock to anyone other than the trustee of a qualified trust or an individual duly licensed to render the same specific professional services as those for which the corporation was incorporated. Stopped there, that would confine a medical entity to physicians. Washington does not stop there.

The multidisciplinary health care carve-out

This is the provision most Washington ownership advice never mentions, and it changes the answer. RCW 18.100.050 goes on to provide that health care professionals licensed under a specific list of chapters may own stock in — and render their individual services through — one professional service corporation, and are to be considered, for the purpose of forming it, as rendering the "same specific professional services."

The list runs by chapter: 18.06 (East Asian medicine), 18.22 (podiatric medicine), 18.25 (chiropractic), 18.29 (dental hygiene), 18.34 (dispensing opticians), 18.35 (hearing and speech), 18.36A (naturopathy), 18.50 (midwifery), 18.53 (optometry), 18.55 (ocularists), 18.57 (osteopathic medicine), 18.59 (occupational therapy), 18.64 (pharmacy), 18.71 (physicians), 18.71A (physician assistants), 18.74 (physical therapy), 18.79 (nursing), 18.83 (psychology), 18.89 (respiratory care), 18.108 (massage therapy), 18.138 (dietitians), and 18.225 (counsellors and therapists). Note what the deeming provision does and does not do: it governs co-ownership, not scope, and enlarges nobody's licence by a millimetre.

Directors, officers, and the governance layer

Ownership is not the only lever chapter 18.100 RCW controls. Under RCW 18.100.065, all directors and all officers other than the secretary and the treasurer must be licensed to render the same specific professional services as those for which the corporation was incorporated. So a lay entrepreneur may serve as the professional entity's secretary or treasurer and nothing more. Putting the MSO owner on that board is a straightforward conflict with the statute.

The PLLC alternative under RCW 25.15.046

Washington's PLLC statute mirrors the corporate rule and carries essentially the same health care chapter list, so the multidisciplinary route exists on the LLC side too. Two details matter commercially. The name must contain "Professional Limited Liability Company" or the abbreviation "PLLC." And where members must be licensed, a PLLC failing to maintain professional liability insurance, a bond, or other evidence of financial responsibility of at least one million dollars exposes its members to personal liability.

What the lists do not include

Chapter 18.16 RCW — cosmetology, barbering, esthetics, and manicuring — appears on neither list, and neither does any general business credential. That absence is the operative rule for a large share of Washington med spas, whose founder is so often a master esthetician with a successful skin practice who now wants to add injectables. Our Washington esthetician and master esthetician scope guide maps where that licence stops.

Can a Non-Physician Own a Med Spa in Washington?

What a person with no health care licence cannot own

Verdict: no ownership interest at all in the entity that renders medical services. Morelli's language is expansive — no part in owning, maintaining, or operating a business that practises medicine. No shares or membership interests, no board seat, no officer position other than secretary or treasurer, and no employing licensees through a company they own. Interposing a holding company does not launder it, because the doctrine follows the beneficial owner.

What a person with no health care licence can own

A lay entrepreneur may own outright:

• The management services organisation supplying premises, equipment, systems, and administrative staff to the clinical entity.
• The brand, trademarks, website, and marketing assets, licensed to the professional entity on arm's-length terms.
• The real property or lease, subleased to the practice at fair market value.
• The equipment, leased to the practice — though device selection with clinical implications should be a joint decision.
• A separate esthetics or retail business alongside the medical practice, with genuinely separate books.

Can an ARNP Own a Med Spa in Washington? The State's Distinctive Angle

Why full practice authority changes the ownership question

Verdict: yes — an ARNP can own the clinical entity outright, and it is the cleanest ownership route in Washington. Chapter 18.79 RCW sits on the ownership lists in both RCW 18.100.050 and RCW 25.15.046, so an ARNP may hold shares in a professional service corporation or membership interests in a PLLC rendering health care services. And Washington grants ARNPs full practice authority: within their population focus, no collaborative agreement, supervising physician, or chart-review relationship is required to evaluate, diagnose, treat, and prescribe. Together those make the friendly-PC gymnastics of restricted states unnecessary — which is why nurse-owned aesthetic practices are so common across Puget Sound. Our nurse practitioner med spa ownership playbook sets Washington beside the other full-practice-authority states.

Prescriptive authority is a separate gate

Full practice authority is not a prescription pad. Botulinum toxin, filler, prescription topicals, GLP-1s, and prescription devices all require a lawful prescription, and the Board of Nursing authorises ARNP prescribing separately from licensure. An ARNP without that authorisation can own the entity and practise nursing fully — and cannot order the products the business exists to sell. Verify the credential, not the job title.

The scope ceiling on an ARNP-owned entity

The limit is worth stating plainly: the entity may only offer services its licensed owners and staff are actually authorised to perform. Ownership does not confer scope. An ARNP-owned PLLC covers the great majority of a modern med spa menu; where the menu reaches services requiring physician involvement, the entity needs that licensee inside it, as co-owner or employed practitioner.

Where the ARNP-owned model quietly breaks

Three failure patterns recur, and none is exotic:

• The absentee ARNP owner. An ARNP lends their licence to a structure an unlicensed partner runs day to day. This is the lay-ownership problem wearing a nursing badge, and it exposes the ARNP's licence first.
• The owner-RN practising like a prescriber. Ownership does not create prescriptive authority, and an owner-RN selecting product and dose is practising medicine irrespective of the cap table.
• The delegation gap. An ARNP-owned practice staffed with RN injectors still needs a lawful order for every treatment and a delegation framework matching the rule each procedure runs under.

One area is genuinely unsettled, and we would rather say so than guess: whether an entity owned exclusively by ARNPs may employ a physician to practise medicine within it. The multidisciplinary provision plainly permits physicians and nurses to co-own one entity, but the mirror image has not been squarely resolved and reasonable Washington counsel differ. If your plan depends on it, get an opinion before signing anything.

RN, LPN, Esthetician, and Pure-Investor Ownership

Registered nurses and LPNs

Verdict: they may hold equity, and equity alone will not make the practice lawful. RNs and LPNs are licensed under chapter 18.79 RCW, which is on both ownership lists, so an RN can be a shareholder of a health care professional corporation — genuinely useful for a nurse-and-physician partnership. The limit is that neither an RN nor an LPN can independently evaluate a patient, establish candidacy, prescribe, or issue the order that makes a cosmetic injection lawful. A practice owned solely by RNs has an ownership structure without a clinical engine, and a contracted prescriber fixes that only if they genuinely hold clinical authority rather than a title.

Estheticians and master estheticians

Verdict: no equity in the clinical entity — and a real business of their own. Chapter 18.16 RCW is absent from the ownership lists, and no supervision arrangement cures that. What works is a genuine split: the esthetician owns the esthetics business delivering everything within esthetics scope, while a separate professional entity owned by qualifying licensees delivers the medical services, with a clear management or space-sharing agreement between them.

The Department of Health's own med spa guidance flags exactly this territory, noting that an ownership interest in a business providing esthetic services raises prohibitions against fee-splitting, rebating, the corporate practice of medicine, and aiding or abetting unlicensed practice — and recommends legal advice on structure.

The pure investor

Verdict: no direct ownership, and a workable indirect position. Private capital is active in Washington aesthetics and is not barred from the sector; it is barred from the professional entity. Investors buy the management company, its contracts, its brand, and its earnings stream. What they must not buy — even through drafting — is the ability to direct clinical operations.

MSO and Management-Services Structures in Washington

The two entities

There is a professional entity — a PS or PLLC owned by qualifying licensees, employing or contracting the clinical staff, owning the patient records, holding the clinical policies, and billing for medical services. And there is a management entity, owned by anyone, holding the premises, equipment, systems, brand, and administrative staff and supplying them to the practice under a written management services agreement for a fee.

What the MSO can legitimately do

• Provide and maintain premises, build-out, furniture, and non-clinical equipment.
• Employ and manage reception, scheduling, sales, and administrative staff.
• Run marketing, branding, and the website, subject to the licensees' sign-off on clinical claims.
• Handle billing operations, payroll processing, bookkeeping, vendor contracts, and IT.

Where an MSO tips into unlawful control

These are the provisions that convert a management agreement into corporate practice of medicine — a close paraphrase of what the 2026 bill sought to prohibit outright:

• Hiring, firing, or disciplining clinical staff on clinical grounds, or holding a veto over those decisions.
• Setting or approving clinical protocols, treatment parameters, or which services the practice offers on clinical grounds.
• Determining patient candidacy, treatment plans, or visit length, directly or through productivity targets that function as clinical instructions.
• Owning or controlling the medical records, or restricting the licensee's access to them.
• Setting fees for medical services, as opposed to being paid a negotiated fee for management services.
• Controlling the professional entity's equity through a nominee shareholder and a stock transfer restriction agreement that lets the MSO replace the owner at will.

That last one deserves emphasis. The captive-PC arrangement — a friendly licensee nominally owning the practice while contractually surrendering the ability to keep it — is the highest-risk feature in Washington, and the exact structure legislators tried to outlaw in 2026.

Getting the management fee right

Fee design carries both corporate-practice and anti-rebate exposure. The defensible posture is a fee at fair market value for the services actually provided: documented, commercially reasonable, fixed or cost-plus where possible, and not varying with the volume or value of referrals. Percentage-of-collections fees are common in the industry and most likely to attract scrutiny here, particularly alongside control features.

Fee-Splitting, Rebating, and Kickback Exposure

What RCW 19.68.010 prohibits

It is unlawful for any person, firm, corporation, or association to pay, offer to pay, or allow — directly or indirectly — a rebate, refund, commission, unearned discount, or profit to a person licensed to practise medicine and surgery, drugless treatment, dentistry, or pharmacy in connection with the referral of patients or the furnishing of care. Violation is a misdemeanour, and chapter 19.68 RCW separately exposes a licensee to suspension or revocation for participating in the division, rebate, splitting, or refunding of a fee.

A practitioner's own financial interest is handled by disclosure rather than a flat bar: it is not prohibited where the referring practitioner discloses it to the patient in writing, provides a list of effective alternative facilities, and assures the patient they will not be treated differently for choosing one. Columbia Physical Therapy also confirmed the statute targets consideration paid for referrals or in connection with furnishing care, not every intra-organisational money flow.

Where med spas trip it

• Commission on treatment sales — paying an injector or prescriber a percentage of revenue from services they recommend. Common in aesthetics, and the classic exposure.
• Referral payments between the esthetics and medical sides of a split structure, the fee moving to whoever sent the patient upstairs.
• Percentage-of-collections management fees where the MSO's economics track clinical volume the MSO also influences.
• Undisclosed ownership in an ancillary supplier or lab the practice routinely uses, without the written disclosure the statute requires.

SB 5387: The 2026 Bill That Would Have Rewritten Washington Ownership

What the bill proposed

Second Substitute Senate Bill 5387, introduced in January 2026, would have codified and expanded the corporate practice doctrine, aimed squarely at the MSO-and-professional-corporation model used by private equity. Professional corporations would have had to be owned by "medical licensees" holding all voting shares, all board positions, and all officer positions except secretary and treasurer, and demonstrating meaningful ownership through substantial engagement in the practice. It would also have barred licensees from relinquishing control over operations affecting clinical decision-making to anyone other than another medical licensee.

What happened to it

It died. 2SSB 5387 failed to advance out of the Senate and was placed on the Senate Rules "X" file, showing as dead as of late February 2026. Washington did not join Oregon and California in tightening its corporate practice rules this cycle.

What that means for your structure

The pre-existing law is unchanged: Morelli, Columbia Physical Therapy, chapter 18.100 RCW, RCW 25.15.046, and chapter 19.68 RCW all stand as before. But the "meaningful ownership" standard the bill proposed describes what a sceptical regulator or judge already looks for when testing whether a nominal owner is real, so treat it as a design target. And a bill that reached second-substitute form before dying on the calendar is a bill that comes back.

Where the Medical Director Fits in a Washington Ownership Structure

When a physician is actually required

Washington issues no med spa facility licence and imposes no blanket requirement to appoint a medical director. Whether you need a physician depends on the service menu and on who holds clinical authority. A practice built on an ARNP with prescriptive authority may need none. A practice delegating under WAC 246-919-606 needs a delegating physician who meets that rule in substance, not merely in title.

What WAC 246-919-606 demands of the delegating physician

The obligations are concrete and documentary: being fully and appropriately trained in each nonsurgical medical cosmetic procedure before performing or delegating it, keeping that record on site and available on request, delegating only to a properly trained PA, RN, or LPN, maintaining a written office protocol naming the responsible physician and including patient screening criteria, permitting no re-delegation, and being able to respond within thirty minutes to treat complications.

Read that against an ownership structure and the tension is obvious. A physician bearing those duties must have real authority over how the clinical operation runs. A management agreement leaving them responsible while stripping their control has not created a compliant structure — it has created a defendant. The med spa medical director guide covers what the agreement should contain.

Owner authority and clinical authority are different things

The cleanest Washington structures separate the two and write it down. The owner decides what business to be in, what to invest in, and how to grow. The licensee decides who is treated, with what, by whom, and when to stop. Where a decision has both dimensions — a new service line, a device purchase, an injector hire — the documents should give the licensee the clinical veto, and the practice should be able to point to occasions when it was actually used.

What Happens If a Washington Med Spa Is Structured Wrong

Exposure for the licensee inside the structure

The physician or ARNP whose licence supports the practice is the most exposed person in the building. RCW 18.130.180(10) makes aiding or abetting an unlicensed person to practise unprofessional conduct, and the Uniform Disciplinary Act track runs from reprimand through conditions and suspension to revocation. Improper delegation under WAC 246-919-606 is separately actionable. The lay owner who designed the arrangement usually has no licence to lose; the licensee does.

Exposure for the lay owner

Under RCW 18.130.190 the Secretary of Health may issue a cease-and-desist order against unlicensed practice — including a temporary order where delay would irreparably harm the public — and impose a civil fine of up to one thousand dollars for each day. Unlicensed practice of a profession requiring a licence is a gross misdemeanour, with each subsequent violation a class C felony. An order to stop operating is the existential outcome, not the fine.

Contract, insurance, and transaction fallout

This is the part owners underestimate. Morelli held the illegal partnership agreement unenforceable, so a lay owner in a defective structure may find their equity, buyout, and profit-share provisions worth nothing when they most need them. Carriers commonly exclude acts outside the insured's scope and can dispute coverage where the structure is itself unlawful. Buyer diligence now examines corporate structure early, and a defective one kills deals or reappears as an indemnity following the seller for years.

A Decision Framework by Your Own Licence

If you are a physician (MD or DO)

You have the widest options. Form a professional service corporation under chapter 18.100 RCW or a PLLC under RCW 25.15.046, own it directly, and hold the clinical authority the delegation rules assume. Co-owners may come from any listed health care chapter, and an ARNP partner is a sensible pairing. Keep lay capital in a separate management entity. Your realistic exposure is not ownership — it is delegating procedures you are not trained in, or lending your name to a structure you do not run.

If you are an ARNP

Own the entity yourself. Confirm your prescriptive authority is current and that the DEA registration matches what you intend to prescribe. Scope the menu to what you may lawfully deliver and supervise, and where it exceeds that, add the right licensee rather than stretching. Document the delegation framework for any RN injectors from day one.

If you are an RN, LPN, PA, or esthetician

Equity is available to the first three under the chapter lists and not to the fourth. For all four the harder question is where clinical authority comes from, because none of these licences supplies it alone. The workable pattern is partnership with a physician or ARNP holding genuine clinical authority — or, for estheticians, a clean split between an esthetics business you own and a professional entity you do not.

If you hold no health care licence

Build the MSO, and build it properly. Retain a Washington healthcare attorney before formation rather than after, paper the management agreement with a fair-market-value fee and no clinical control features, and choose a clinical partner with real ownership, real involvement, and no transfer restriction making that ownership illusory. If you would rather build on documentation that already exists, our library of ready-to-use med spa compliance SOPs covers the operational side of every structure above.

Washington med spa ownership in plain terms

• No CPOM statute — the doctrine comes from Morelli v. Ehsan (1988), reaffirmed in Columbia Physical Therapy (2010).
• Chapter 18.16 RCW esthetics is not on either list — an esthetics licence does not qualify for equity in the clinical entity.
• Bad structures draw cease-and-desist orders, fines up to $1,000 per day, licensee discipline under RCW 18.130.180(10), and unenforceable equity agreements.

For more Washington-specific compliance guides as this cluster grows, browse the Washington med spa compliance hub.

This article is for informational purposes only and does not constitute legal advice, and no attorney-client relationship is created by reading it. Washington's corporate practice of medicine doctrine rests on case law rather than statute, and the professional-entity, anti-rebate, delegation, and disciplinary provisions described here are administered by several bodies — the Washington Medical Commission, the Washington State Board of Nursing (formerly the NCQAC), and the Department of Health among them — and change over time. Where Washington's position is genuinely unsettled, we have said so rather than guessed. Ownership structuring is fact-specific: engage a Washington healthcare attorney to design and paper your structure before you form an entity, sign a management agreement, or take outside investment.

Frequently Asked Questions