1.2 Washington Scope of Practice: Esthetics vs. Master Esthetics
Key Takeaways
RCW 18.16.020 allows estheticians to use superficial and light peels and any device except a laser; master esthetics adds medium-depth peels and medical devices for skin care and permanent hair reduction.
The statute names lasers, light, radio frequency, plasma, intense pulsed light, and ultrasound as examples of master-esthetics medical devices, subject to any delegation or supervision rules.
DOL guidance says master estheticians may use FDA prescription devices only under the authority of a licensed physician; both license levels may use over-the-counter devices.
Under no circumstances does the practice of esthetics include the administration of injections, and master esthetics is built on that same definition.
WAC 308-20-080(6) requires 450 additional master esthetics hours covering energy devices, medium-depth peels, advanced assessment, pre- and post-treatment care, lymphatic drainage, and spa body treatments.
Why Scope Is Tested
The NIC Advanced Practice outline asks candidates to recognize "issues outside of scope of practice (e.g., diagnosing, prescribing, medical authorization)." In Washington, those limits come from RCW 18.16.020, DOL guidance on devices, and the medical rules covered in section 1.3. Knowing the exact statutory wording helps you answer judgment questions about referral, delegation, and safe practice.
The Two Statutory Definitions
Practice of esthetics (RCW 18.16.020(30)) is the care of the skin for compensation by:
- application and use of preparations, antiseptics, tonics, essential oils, exfoliants, and superficial and light peels;
- any device, except laser, or equipment, electrical or otherwise;
- wraps, compresses, cleansing, conditioning, stimulation, superficial skin stimulation, pore extraction, and product application and removal;
- temporary removal of superfluous hair by lotions, creams, appliance, waxing, threading, tweezing, or depilatories, including chemical means;
- product applied to the eyelashes and eyebrows, including extensions, design and treatment, and tinting and lightening of the hair, excluding the scalp.
The definition ends: "Under no circumstances does the practice of esthetics include the administration of injections."
Practice of master esthetics (RCW 18.16.020(32)) is the care of the skin for compensation, including all of the methods allowed in esthetics, plus:
- the performance of medium depth peels; and
- the use of medical devices for care of the skin and permanent hair reduction, including but not limited to lasers, light, radio frequency, plasma, intense pulsed light, and ultrasound.
The use of a medical device "must comply with state law and rules, including any laws or rules that require delegation or supervision by a licensed health professional acting within the scope of practice of that health profession."
Side-by-Side Comparison
| Topic | Esthetician | Master esthetician |
|---|---|---|
| Peels | Superficial and light peels | Adds medium-depth peels |
| Lasers | Excluded ("any device, except laser") | Allowed as medical devices, subject to delegation rules |
| Other energy devices | Over-the-counter devices only (DOL guidance) | Prescription devices only under physician authority (DOL guidance) |
| Hair removal | Temporary methods | Adds permanent hair reduction with medical devices |
| Injections | Never included | Never included |
| Pore extraction, wraps, masks, lash and brow services | Included | Included |
The statute does not define "medium depth" by acid percentage or tissue layer. Exam questions use the professional depth classification taught in Chapter 5: very superficial, superficial, medium (through the papillary dermis into the upper reticular dermis), and deep. Deep peels, such as phenol and croton-oil formulas, go beyond the medium-depth peels named in the statute and are performed by physicians.
Devices: Prescription vs. Over-the-Counter
DOL's licensing page explains how device classification drives scope:
- The FDA labels a device as prescription or over-the-counter in its intended-use statement. You can check a device by entering its product code on the FDA Product Classification website.
- A licensed physician may delegate the use of prescription devices to a trained, licensed professional whose license and scope allow it. Master estheticians may use prescription devices only under the authority of a licensed physician.
- Estheticians and master estheticians may use devices the FDA has cleared for over-the-counter use.
- Laser technicians can get a master esthetics license, or a Department of Health credential that allows prescription device use.
Some services on the NIC outline are not named in the statute at all. Microneedling is one example. The FDA classifies a "microneedling device for aesthetic use" as a Class II device (21 CFR 878.4430), and cleared devices such as the SkinPen are labeled for prescription use. Treat services like this as a device-classification and delegation question: confirm the device's FDA status and the applicable medical rule before you offer it.
The Master Esthetics Curriculum
WAC 308-20-080(6) lists the 450 additional hours for master esthetics. They include theory, business practices, and basic anatomy and physiology, plus:
- (a) laser, light frequency, radio frequency, ultrasound, and plasma practices for all hair and skin types;
- (b) medium depth chemical peels;
- (c) advanced client assessment, documentation, and indications and contraindications;
- (d) pretreatment and post-treatment procedures;
- (e) lymphatic drainage and advanced facial massage;
- (f) advanced diseases and disorders of the skin;
- (g) advanced theories; alternative, touch, and spa body treatments;
- (h) cultural competency and historical education on the significance of textured hair, added by a rule change effective August 2, 2026 under the 2025 textured-hair law (chapter 194, Laws of 2025);
- (i) a rule that medical devices used during instruction must comply with delegation and supervision laws, with a written course explanation approved by DOL.
Services You Must Refuse or Refer
- Injections of any kind, including neuromodulators, fillers, and platelet-rich plasma, are outside both scopes.
- Diagnosis and prescribing belong to licensed health professionals. Refer suspicious lesions, infections, and medication questions.
- Open sores, inflamed skin, rash, or parasitic infestation: WAC 308-20-110(1)(e) says a licensee must not perform or continue services on such a client.
- A licensee with open sores or symptoms of an infectious or contagious disease, a skin disorder, or a parasitic infestation may not provide services while those symptoms are present (WAC 308-20-110(1)(f)).
Discipline
RCW 18.16.200 lets the director discipline a licensee who practices without a required license, fails to display licenses, or violates the chapter or its rules. After a hearing, RCW 18.16.210 penalties include denial, suspension, or revocation of a license, a fine of not more than $500 per violation, reprimand, probation, restriction of scope, restitution, and required additional training.
Important
The safest exam answer is usually the one that keeps the practitioner inside the written scope, documents the decision, and refers medical questions to a licensed health professional.
Under RCW 18.16.020, which service is allowed for a master esthetician but excluded from the practice of esthetics?
Superficial and light peels using exfoliants
Temporary hair removal by threading or waxing
Pore extraction with a comedone extractor
Laser hair reduction, subject to delegation rules
A spa owner asks a Washington master esthetician to inject a hyaluronic acid filler after training with the manufacturer. What is the correct response?
Proceed, but only while a physician is reachable by telephone
Proceed after earning the manufacturer's injector training certificate
Decline, because injections are never part of either esthetics license
Proceed, as long as the client signs a written consent form first
According to DOL guidance, how should a master esthetician determine whether a skin device needs physician authority?
Check the device's FDA classification, such as by product code
Ask whether the client's doctor has recommended the device
Assume any device sold online is cleared for over-the-counter use
Ask the sales representative whether the device is cosmetic
Sections you finish are checked off in the contents.