The scopes, briefly, because you probably half-know them
A physician holds the widest training and can act with the fewest constraints on scope.
Advanced practice clinicians, meaning nurse practitioners and physician assistants, examine patients, prescribe and inject, within oversight rules that shift depending on the state and the setting they work in.
Registered nurses do a great deal of the injecting in this industry, operating under a delegated plan written and overseen by a physician.
Every one of those is a legitimate route to being excellent at aesthetic injecting. None of them is evidence that a given individual has arrived. Injecting is a manual craft acquired through repetition, and repetition doesn't print on a certificate.
