Five-year-old James suffers from a rare genetic disorder called Hunter's Syndrome.
The drugs to treat it are among the most expensive in history - a full treatment costs up to $500,000 a year.
Pharmac have a finite amount of money to spend on drugs so what do they do?
There are only two children in the country with this condition, one is funded and the other is not.
Why? Who decides? And how?
Watch the full report from John Sellwood.