Who Can Legally Treat You at a Med Spa in Washington?

Med spa work in Washington falls across several regulators, which is the first reason the answer to “who can do this?” depends entirely on which license the provider holds:

• Washington Medical Commission — regulates physicians (MDs) and physician assistants.
• Washington State Board of Osteopathic Medicine and Surgery — regulates osteopathic physicians (DOs).
• Washington State Board of Nursing — regulates advanced practice registered nurses, registered nurses and licensed practical nurses.
• Washington State Department of Licensing — regulates estheticians and master estheticians.
• Washington State Pharmacy Quality Assurance Commission — regulates medication and compounding.

The Washington State Department of Health convenes a Med Spa and Esthetic Services Work Group and publishes guidance for businesses offering esthetic services to the public. So a single treatment room can sit across five different regulators at once. Who is responsible, and under what rules, comes down to the license.

Physicians and the people they delegate to are governed by WAC 246-919-606, which covers nonsurgical medical cosmetic procedures. That rule defines a nonsurgical medical cosmetic procedure as a procedure or treatment involving the injection of a medication or substance for cosmetic purposes, or the use of a prescription device for cosmetic purposes.

Before authorising treatment, the physician must:

• take a complete history,
• perform an appropriate physical examination,
• make an appropriate diagnosis,
• recommend appropriate treatment,
• obtain the patient’s informed consent,
• provide instructions for emergency and follow-up care, and
• prepare an appropriate medical record.

The physician must be fully and appropriately trained in the procedure before performing it or delegating it, and remains ultimately responsible for the safety of the patient.

Where a physician delegates to a physician assistant, registered nurse or licensed practical nurse, conditions apply. The delegate must be trained in the technique for each procedure, in cutaneous medicine, in indications and contraindications, in pre- and post-procedure care, in complication management and in infection control. A written office protocol must guide the delegate’s performance. Each patient must sign a consent form before treatment listing foreseeable side effects and complications.

The two supervision standards matter. For substances not approved by the FDA, the physician must be on site for the entire procedure. For FDA-approved substances, the physician must be reachable by phone and respond within thirty minutes. A delegate may not further delegate the procedure to anyone else.

This is an important point about scope: WAC 246-919-606 governs physicians and the people they delegate to. It does not govern nurse practitioners, who practise under a different statute. The equivalent rules for osteopathic physicians are WAC 246-853-630 and WAC 246-853-640; for physician assistants they are WAC 246-918-125 and WAC 246-918-126. A physician’s use of laser, light, radiofrequency and plasma devices is governed by WAC 246-919-605.

Nurse practitioners are regulated by the Board of Nursing under RCW 18.79.050, advanced practice registered nursing. Washington is a full practice authority state. The statute requires no physician supervision, no delegation agreement and no collaborative agreement for an advanced practice registered nurse to practise within her scope. An ARNP with board approval may prescribe.

What that means in practice is that the nurse practitioner is the responsible clinician — not a delegate operating under someone else’s license. She takes the history, examines the patient, makes the clinical decision, writes the order, and remains responsible for the care.

One title note: Washington is changing the advanced practice nursing title from Advanced Registered Nurse Practitioner (ARNP) to Advanced Practice Registered Nurse (APRN), under House Bill 2416 from the 2023–24 session, effective 30 June 2027. Until then both titles may be used, which is why you may see either.

Registered nurse scope is set by RCW 18.79.260. An RN may administer medications, treatments and tests, and practises under the general direction of an authorised practitioner. An RN giving an injectable is doing so on the order and under the direction of that practitioner.

Licensed practical nurse scope is set by RCW 18.79.060 and WAC 246-840-705. An LPN practises interdependently or dependently, is limited to routine nursing situations relatively free of complexity, cannot diagnose or prescribe, and cannot delegate to anyone.

The Board of Nursing publishes an advisory opinion on medical, aesthetic and cosmetic dermatological procedures, effective 12 September 2025, which supersedes its previous version of 14 May 2021.

The honest practical point: an RN administering an injectable is doing so on the order and under the direction of an authorised practitioner, which means somewhere there has to be a practitioner who evaluated you. The question worth asking is who that was, and whether you met them.

Estheticians and master estheticians are licensed by the Department of Licensing under chapter 18.16 RCW and chapter 308-20 WAC. Per Department of Health guidance, an FDA-designated prescription device may be used by an esthetician or master esthetician only under the supervision of a physician (MD or DO).

Esthetics and medical practice are two different licenses with two different regulators and two different scopes. An esthetician license is not a medical license, and the work an esthetician may perform independently differs from what requires medical supervision.

Per Department of Health guidance, an IV hydration bag is a medication, so a medication order is required before IV hydration therapy is initiated. That single fact changes what a compliant IV service has to look like: the patient has to be evaluated and an order has to be written before anything is infused. A walk-in retail model, where a patient picks a drip from a menu, does not meet that on its own.

Pharmacy Commission licensees must comply with United States Pharmacopeia standards when compounding medications — RCW 18.64.270 and WAC 246-945-100. A compounded medication is prepared by a pharmacy rather than manufactured as an FDA-approved product, and compounded formulations are not themselves FDA-approved. Read more on our compounded semaglutide page.

These are written for your benefit, whether you come here or go somewhere else:

• What license do you hold?
• Who evaluated me, and did I meet them?
• If you are an RN or an esthetician, whose order or supervision are you working under, and where are they?
• Is the medication you are using FDA-approved or compounded, and which pharmacy prepares it?
• Is there a written protocol for complications?
• Can I look your license up?

Then do it. The Washington Department of Health’s provider credential search is public and free. You can verify any health care provider’s license in a few minutes.

Keanna Wolcott is a board-certified nurse practitioner practising under full practice authority. She owns the practice and writes her own orders. When she treats you herself, she evaluates you as part of your care. When a registered nurse performs a treatment here, Keanna completes a good faith exam first — in person or via face-to-face telehealth, whichever suits you — to meet Washington’s safety guidelines. We invite you to look her license up on the Department of Health credential search.

Rules change. This page describes the position as published by the named agencies and as of the dates given above. Anyone with a specific question about a license, a device or a medication should check with the relevant agency directly.