Hi I just received Storm's PTH blood test results and this is what my vet said:

I in fact just received his results. While his ionized calcium is slightly elevated, his PTH and vit D levels are normal. The interpretation from the endocrinologist suggests that these findings of mild elevated ionized calcium is of questionable significance. Idiopathic hypercalcemia has questionable significance in cats. I have no evidence that we are dealing with cancer or with something called granulomatous disease (because his has no signs, and because this phosphorous levels are normal). In other words, I think Storm is just fine. We will continue to watch his his calcium and phosphorous levels, but at this time, I do not recommend further action.

So for now everything is fine and we'll just watch his calcium and phosphorous levels. Thanks again for keeping him in your thoughts and prayers.