People who don't leave messages are usually telemarketers, especially when the call from out-of-state.I've saved this number to my caller ID under "scam" so if they call again I'll know to ignore it.

This was a weird one. The caller ID lit up with this number & with the name Cigna, which is who my healthcare insurance is with. They said my name (first & last, & although they had no discernible accent they still mispronounced my last name) that someone had my "health card", & then they gave me the person's phone number so I could find out how to pick it up! And even weirder, the phone number they gave me was in my area code. I called the 513 number, & it just rang & rang. I called the number they left & a guy with an accent picked up; I apologized, saying I had the wrong number, & hung up. Then I called the Cigna number on the back of my insurance card & gave the customer service rep all of the info. He said that the 513 number didn't ring any bells to him, & that it did indeed seem like some kind of scam, although a strange one... what could they hope to get out of it? He told me that his wife had a call the other day where the caller ID lit up with her phone number!! The one that it was calling!! Very strange indeed. Anyway, just to be on the safe side, they're sending me new insurance cards, & he told me to ignore the weird message.

It could be the person who called you was warning you of "medical identity theft" by another person.

http://www.consumer.ftc.gov/articles/0171-medical-identity-theft
Federal Trade Commission
Consumer Information

A thief may use your name or health insurance numbers to see a doctor, get prescription drugs, file claims with your insurance provider, or get other care. If the thief’s health information is mixed with yours, your treatment, insurance and payment records, and credit report may be affected.

If you see signs of medical identity theft, visit IdentityTheft.gov to report and recover from identity theft.

--- more information in the rest of the article.