Costs can vary from city to city. Even for a Dr's office.
My old dermotoligist moved to a neighboring town, because the property taxes were 1/2. His rent on a buillding the same size was almost 1/2. The "new" town where he moved also gave all new business tax credits.
Those type of costs can will greatly effect how much it costs to run an office or clinic. Even comparing wages from state to state. Those type of things.
It ends up comparing apples to cauliflower.