This is an odd item that appeared in the 4e Player's Guide and had not rules associated iwth it, and was carried over to PF.
For what I would rule - this would act like a Healer's Kit in Zeitgeist, just further themed to the setting. A surgeon's kit would be more acceptable in higher technology and better educated regions, while some fringe groups (like the druids of Risur) would likely still use the herbs provided from a healer's kit.
Basically... treat as a themed healer's kit.