And, once you are diagnosed with a mood disorder they will not look at anything else. Anything other symptom arises from "my mood disorder". Skin issues, hyperlipidemia, gut issues, pain, etc...all in my head.
However, it seems that some physicians oversimplify diagnosis so that _only_ the likeliest scenarios are considered. It's also an opportunity for subjective biases to influence an individual doctors definition of "likely."
E.g. Trans broken-arm syndrome