i am here filling out the form the insurance ppl send me.
i just dont know if they need all this info ..
pls help .

Yes they need the information requested. They will then have a file on you, wife etc.
If someone would attempt to file a false claim using your name etc it would be caught immediately. Information provided to Insurance companies, Physicians, surgeons and others in the medical profession, finance fields etc can be used to protect you.