Puzzles and Riddles #99158

Solve if you can...
It is a 9 letter word 123456789,
If you lose it you die,
If you have 234, you can 1234,
56 is one type of disease,
89 indicates exact location and time,
2 and 7 are same letters, 3 and 8 are the same letters, and 5 and 9 are also the same letters.
Guess the word?
It's a Challenge for all masterminds!