Hello!
I am searching for a story I read, well, probably many years ago now.
A woman, perhaps a nurse, gets a job at a mental asylum or institution. The head doctor, a woman, has her stay overnight as a patient - kind of under cover but I believe so she can get a feel for the experience of their patients. The Doctor creates a fictional ID for her, while placing the real ID in the office safe.
The undercover nurse discovers something is wrong when the doctor does not come back for her.... soon learning that the doctor was in a car accident and is now in a coma.
She then spends a lot of time trying to convince another doctor of her real identity, telling him about her real ID in the other doctor's safe.
These are the main points that I recall at the moment, I hope someone here is familiar with it and can point me in the right direction to find it again. I do not recall what website I originally read it on, whether it was Gromet's or DeviantArt, or perhaps elsewhere - maybe even the old GaggedUtopia.
-o0o
(Pronounced "Oh-zer-oh" if curious.)