One of the other users came up with a good idea. Basically, something like $995 for the first doctor and then something like $695 for the others.

Then for support, do something like

1 to 3 doctors: $500 annually
4 to 7 doctors: $1,000 annually
> 7 doctors: $1500 annually

or to that effect.

Bert
Pediatrics
Brewer, Maine