To add some more info.
In many cases, unless they are present in multiple blood culture sets, coagulase negative Staph. (CNS) are considered contaminants. The same goes for alpha hemolytic Strep. that are not S. pneumoniae.
The CNS that's always considered pathogen is S. lugdunensis.
A species to look out for in respiratory cultures is C. auris. That particular species is especially resistant to current treatments, but it is an opportunistic pathogen.
Other than that, the most common bugs you rule out are Group A Strep and S. pneumoniae.
Thanks for that addition. Little oversights like this can cause misdiagnoses and treatment with less effective drugs which further increase multi-drug resistance.