Cody is a small community with limited supply, so prices vary dramatically from property to property. It's difficult to provide an average with only a handful of properties on the market.
That said, There is one that stands out in my mind as suitable for a medical office and it will run you around $15 - $17 per sq.ft. Like everything, price is negotiable and a lot of it depends on what you plan on putting in there. I spoke with the owner a year ago and he's willing to build to suit your needs.
If you're serious, I can get you his contact number.