Diagnosis

From SFWiki

This skill allows a character to rapidly and accurately determine the physical health of another character or monster. Further, successful use of the skill can provide the character information about ailments and effects that are plaguing others.

Higher ranks in this skill mean that the character is better able to determine information about a target. This information is not limited to obvious health problems.

This is a good starting skill for characters who plan to serve in support capacities or to do healing. The special benefits it provides are better left for later levels for most characters, however.