If a search result is a place that only people who live in a certain area can visit, what’s the best way of explaining that?

For example there's a community doctor's surgery in a town, it's free for people who live in town 1 and town 2.

As someone living in town 3 who has searched and found this community doctor's surgery but it won't be free or available to me, what's the best approach to explaining this?

Updated with example Below is a very simplified example of what happens in the current process, I've shown the offline and online version as I think it's important to recognise it's directing people to a physical location.