Private scan?

Katy

I have seen several women mention getting a private scan. This may be a dumb question but how did you find a provider? Are these at a medical facility or something else? I did an initial google search of my area and it I did find a few places that specialize in pregnancy ultrasounds that are not associated with a hospital but it seems like these are places looking to selling pic packages and 3D US. Is this what people refer to as private scan?