Who called from 7632194272

Have gotten a few calls - answered once and nothing and the voicemails are longer than a minute with nothing.

Caller said she was with the nurse line and worked with my employer's insurance company.  Wants to discuss my health.

I received a call 7/28/14 at 4:25 pm, caller id said "UnitedHealth care", but when I picked up I heard just a humming sound.  I said "hello?", but no one spoke, and I hung up.

United Health Care calling very weird left message asking to call back if I get VM leave my Name Number date of birth and address. If it is them very strange to ask for all that information especially with all the scam calls I have been getting.

Just got a call and though I have United Healthcare I didn't think for a minute this was legit.  They don't leave a name, just that they are calling on behalf of a registered nurse with United Healthcare and to call 1-877-370-6829 and leave my name, phone #, DOB and address.  They didn't say my name, or say their name.  Female voice.  #fail