Device classes, and where aesthetic devices sit

The three classes

The FDA classifies medical devices by the level of control needed to give reasonable assurance of safety and effectiveness.

• Class I. Lowest risk, subject to general controls. Many are exempt from premarket notification entirely. Elastic bandages and examination gloves are typical.
• Class II. Moderate risk. General controls are not sufficient on their own, so special controls apply, and most reach market through a 510(k). The great majority of energy-based aesthetic devices are Class II.
• Class III. Highest risk, or insufficient information for the other two. These generally require premarket approval, which does require valid scientific evidence of safety and effectiveness for the claimed use.

What the class tells a provider

Less than people assume. Class is a statement about the regulatory controls applied to a device, not a ranking of how well it works. Two Class II devices cleared for the same indication can behave very differently in a treatment room, and the classification does not distinguish them.

That is precisely the space an independent clinical review is meant to occupy: not repeating what the clearance says, which anyone can look up, but describing what the class was never designed to describe.