The number of Californians who will get a cosmetic injection this year will cross ten million. The number who will verify, before that injection, that the person holding the syringe is licensed to inject is a small fraction of that. This guide is an attempt to make the regulatory framework for medical spas understandable to the consumer — who is allowed to do what, under whose oversight, and where to look it up.

This is not legal advice. It is a plain-English reading of the existing published guidance from the Medical Board of California, the Board of Registered Nursing, and the California Department of Consumer Affairs.

The Core Rule

In California, cosmetic injections — Botox, dermal fillers, Kybella, Sculptra, PDO threads — are the practice of medicine. They can be performed by:

  • A licensed physician (MD or DO), who may perform them directly
  • A licensed physician assistant (PA), nurse practitioner (NP), or registered nurse (RN) — but only after an appropriate examination by a supervising physician and only within their scope of practice, under the physician's standardized procedures or protocols
  • A dentist performing within the oral-maxillofacial scope of their license (this has narrow applicability)

They cannot be performed by estheticians, cosmetologists, massage therapists, or unlicensed staff — regardless of what training they have completed, what influencer content they have produced, or what their social media presents. This is the most-commonly-violated rule in the med spa industry, and the one that generates the most serious consumer-safety problems.

The Medical Director Requirement

Any facility offering the services above must have a licensed physician medical director under a formal written agreement. The medical director is responsible for: establishing and signing the facility's standardized procedures; ensuring appropriate training of nurse injectors; conducting "good faith examinations" of patients (which can be delegated under specific rules but cannot be eliminated); reviewing adverse events; and maintaining overall clinical oversight.

In practice, the medical director is not necessarily present at the facility during every procedure — the law does not require that — but they must be reachable, involved in protocol development, and available for consultation. A facility that cannot tell you who its medical director is, or that does not have one, is not operating within California law.

Telehealth "Good Faith Exams"

Since 2020, California has allowed the "good faith examination" that must precede any injectable to be conducted via telehealth. This has been widely used — most efficiently by high-volume clinics with in-person nurse injectors and a remote physician conducting the exam shortly before or during the patient's first visit. Enforcement of the depth of the exam is an active area of regulatory attention; expect this to tighten over the coming years.

What Estheticians Can And Cannot Do

The California Board of Barbering and Cosmetology regulates estheticians. Within a standard esthetician license, a practitioner can perform:

  • Facials (non-medical)
  • Chemical peels at limited strengths
  • Waxing and hair removal (non-laser)
  • Non-medical microdermabrasion
  • Non-medical microneedling (needle depths limited)
  • LED therapy, high-frequency, and other surface-level modalities

Estheticians cannot:

  • Perform injectable procedures (this is not a gray area — it is explicitly outside their scope)
  • Perform medical-depth microneedling (typically over 0.5mm, though specifics vary)
  • Perform laser procedures (most require physician supervision; some require physician performance)
  • Administer IV therapy (this is nursing/medical scope)
  • Perform PRP preparation or injection

Nurse Injectors — The Core of The Med Spa Workforce

Most injections in a California med spa are performed by registered nurses or nurse practitioners. This is legal and appropriate, provided:

  • The RN or NP holds an active, unrestricted California license
  • A physician medical director has conducted the good faith exam (in person or via telehealth)
  • The RN or NP is operating under standardized procedures signed by the medical director
  • The procedure is within the provider's training and experience

Asking the provider their name and license number, and verifying on the California DCA license lookup, is a 30-second pre-appointment check that will save some number of readers from a preventable adverse event.

License Lookups — Bookmark These

Specific Service-Level Rules

Botox and dermal fillers: Medical. MD/DO/PA/NP/RN-performed under medical director oversight. Estheticians and cosmetologists may not inject.

Kybella: Medical. Same framework.

PDO thread lifts: Medical. Same framework. Requires meaningfully more training than standard Botox; experience matters.

Medical-depth microneedling (with PRP): Medical. RN or NP preferred; some PA offices perform it under supervision.

Cosmetic lasers: Most require physician supervision; some Class IV laser uses require physician performance. This is the most-varied category; verify on a per-device basis.

IV therapy: Nursing/medical. Must be performed by RN/NP/MD/DO. Requires a signed physician order.

BR-style high-performance facials (non-medical): Esthetician scope. No medical oversight required for the facial itself. If medical add-ons are included (e.g., PRP facial, PDRN microneedling), those components require medical providers.

Red Flags — When To Walk Away

  • The facility cannot identify its medical director by name
  • The provider performing your procedure is not on the California DCA license lookup as an MD, DO, PA, NP or RN
  • Pricing is meaningfully below market — especially for injectables (under $10/unit for Botox in LA, under $500 for a syringe of HA filler, is almost always a sign of counterfeit product or inadequate practice)
  • No informed consent document is presented before the procedure
  • Product branding cannot be verified (ask to see the box; refuse product you cannot identify)
  • The injector is performing the procedure somewhere other than a licensed facility — e.g., home parties, hotel rooms

The Bottom Line

California's framework for medical aesthetics is not complicated once you know the shape of it: medical procedures require medical providers, under a medical director, in an appropriate facility, with licensable and verifiable everything. The consumer's part is a 30-second license check and a short conversation with the front desk before the first appointment. Facilities that answer those questions cleanly are operating correctly; facilities that cannot are telling you something important.