Yellowing stem on miniature Phal

[cassie.g]

I just picked up my second orchid. It's some kind of miniature phal hybrid, but it did not have a label so I'm not sure of the name. When I saw it in the store I noticed some yellowing on the stem. I knew I probably should've chosen another plant, but I couldn't resist the blooms on this one.

So, I'm wondering if anyone could diagnose this and tell me what treatment options I have. I'll be repotting shortly (I'm waiting on some supplies from RePotme).

The main question is really, would this be considered crown rot, and should I treat it like crown rot?

Aside from the yellowing stem and root rot, the plant seems fairly healthy. It has a new leaf growing and a budding root and the stem is still firm despite the yellowing.

Thanks in advance!