My district pulled that, too. However, it was our district Sped Director and he also asked me to submit DS's test results. I had results from three doctors (we had lived in three different cities). I only agreed becUse I had a strong sense that my sped dir was really working for my son.
Our school had initially declared my son ineligible and I called OCR and my sped dir. He asked me to wait to file a complaint until we could reconvene the eligibility meeting. He asked for those two things I think to build an airtight case FOR the 504.
I agreed on the condition that I be allowed to talk with their ped, who also happened to be a donor to my org, not that I talked business, but I had some trust for her from the outset. When I talked with her, she basically said looking at his medical records she'd have to trust his doctors, that she was not in the position to counter them.
Also--in our case DS's medical history only underscored the need. Three doctors had do documented reactions. Three sets of RAST results. They made it a slam dunk.
I am NOT recommending this tactic to anyone. I had a strong sense from the Sped Dir that he wanted to make sure DS' eligibility would not be questioned. We were the first 504 for FAs in our district, btw.