Xenomedic (D20 Modern Feat)
From D&D Wiki
You know how to provide safe medical treatment to alien life forms.
Benefit: You can, without penalty, use the Treat Injury skill to perform surgery on a living creature regardless of its type.
Normal: Characters without this feat take a –8 penalty on Treat Injury checks (–4 if they have the Surgery feat) when performing surgery on creatures of a different type.
Special: This feat cannot be used to heal or repair nonliving or inorganic creatures such as constructs or undead.