[Eridrus]

Medicine is a market for lemons, so reputation/brand is important. Many good doctors are full up on patients, but if they can convince you that an unknown doctor in their practice is just as good/under their supervision, they can pocket some of those gains.

This doesn't really require private equity, but PE is providing a way to get a lump sum for this to doctors, and milking that cash cow.

There is also a growing remote/virtual dermatology sector which can see gains from technology, but I doubt PE is involved.