Fortunately I've only had kidney stones once, since my mom has been plagued by them for years. After the tests came back it was discovered that my body lacked a chemical that is used to break down calcium deposits in the body. At the time I was drinking ALOT of soda, and a lot of milk. So I decided to cutback on my soda intake and milk, and drink more juices like cranberry juice. Haven't had a problem since.
Also, while the kidney stone was still in my body I was medically grounded in case of another kidney stone attack. After I passed the kidney stone, I just reported that during my next physical and that was it.