A visitor in the French Quarter with a cracked molar is a choice, not an accident
This city brings in people who do not live here, some of them in pain, and whether you want their business is a decision to make deliberately rather than one to discover in the click report.
A visitor with a broken tooth is a real case: same day, usually self-pay, usually one visit. Some practices want that work and are set up to do it. Some cannot spare the chair time and lose money on it.
Decide first, then set the account to match. If you want it, run a separate emergency campaign with its own budget, its own ad copy about same day treatment, and hours that reflect who is actually at the desk to answer.
If you do not want it, the setting that matters is location targeting. Default settings can serve ads to people merely interested in a place rather than present in it, which buys clicks from someone planning a trip. Set targeting to presence.
Either way, keep visitor traffic out of the campaign you use to judge new patient cost. Mixing a one visit emergency case into the same average as a family transferring in makes both numbers meaningless.