Hi Trista.
The 2 searches actually function a little differently, which is why you see different results. The list under View-Diagnosis Codes uses the technical billing descriptions for the codes, while the MRE search uses more general descriptions.
An example of this is R23.8. In the MRE, you can find this by searching "Cold Skin". But from the View-Diagnosis Codes search, searching for Cold Skin comes up blank. That is because the official billing description is "Other skin changes".
I hope this makes sense on why you get different search results.
