u/sygnathid

I had to call in due to a low nighttime blood sugar/seizure, so I put it as an FMLA absence, since type one diabetes should be an FMLA condition; my appointment with my endocrinologist was a week later, but the packet hadn't arrived yet so I found this NALC form and had my doctor fill it out, then sent it out in the envelope from the FMLA packet when it arrived the next day.

Now it's been about a week and a half since I mailed it out, and my supervisor just told me that they got an email saying my FMLA was denied; should I have asked my doctor to fill out the forms a more particular way? Why might it have been denied?