Copy and paste whatever your passport says. This important because some people might have two names and/or two family names, but not always everything is on the passport. Only what's there matters for the visa.
It's not every 6 months, I mean, the maximum yes. But if you normally travel here and then, you won't need even need to care about it. But, about your specific question, there's no minimum, you can stay a day or two, or even come back on the same day, as the visa allows that.
If you're from a visa exempt country, you can stay up to 3 months* without any visa for medical treatments. That's the rule, it's written like that on the Embassy website, so no need to worry, you'd be still following their own rules.
(You'll get a 60 days stamp first, and later you'll need to manually extend to get the other 30)