Jacintha Saldanha died by hanging and left three suicide notes for loved ones, the coroner has confirmed.
Westminster Coroner's Office said Saldanha was found by a colleague and a member of security staff in the King Edward VII's Hospital accommodation.
Saldanha was pronounced dead by paramedics on 7 December. She left behind two teenage children and her partner Ben Barboza.
An inquiry into her death has been launched.
She was the nurse who took the call from 2DayFM DJs Mel Greig and Michael Christian, who hosted the Australian radio show Summer30.
Since her death, Southern Cross Austereo, which owns 2DayFM, said it will give at least £326,000 to Saldanha's family from advertising profits.
David Cameron said: "She clearly loved her job, loved her work and cared deeply about the health of her patients and what has happened is a complete tragedy.
"There will be many lessons that need to be learnt."
The Samaritans say that people feeling distressed who feel the need to talk to somebody should call them on 08457 90 90 90 or email email@example.com