Ok. So today I received a second call from Medibank, and this time they deigned to identify themselves. I told them I did not want to be contacted and the guy asked me for my details so I could be removed from their call list. I consider this an invasion of privacy. I should not have to do anything to stop being harassed by a company - they have my number from their records and I am not wanting anything other than to be released from their harassment. I do not consider it appropriate to offer my personal details to an unsolicited caller, who might in fact merely be posing as Medibank. Any further calls and my first step will be to demand they stop harassing me without my being required to provide identification details. The call after that, should one be made, will result in a trip to my lawyer to determine if proceedings can be brought against this company for their harassment.

Hehehe i just googled this number coz i didn't want to answer it, and it brought me here!
How annoying are they?!?!

yeah, i received call from them today, same as above described, background music and then hangs up after 3 seconds. I too am with Medibank.big ups to this site and responses to helping figure it out.

I get a call from this number at least once a week on my work phone, but have never got to answer it, and no message ever left. Now they ring my mobile, for 2 rings and hang-up. Must be a ploy to get you to call them back. I have a policy with Medibank, but seems strange they resort to this type of marketing technique..Its very annoying..

Found this forum through Google, had a missed call on my mobile today, no voicemail, wondered who it was. Thanks for the enlightenment.

I got call from this number (03) 8330 5100).was told " I am calling from Medibank. Do you have any questions regarding your policy?" I said "No, I am happy with my current policy" and hang up.
but it looks pretty strange how come medibank will call & ask for questions whereas when we need to speak to customer support from medibank it takes ages.
For a moment I thought this may be geniune call from medibank but could not believe it & then googled it & found thi link.