Robo call - did not leave message of intent

Reminding me to get a flu shot

United Health Care....wanting to know my birthday? They called me! They never call. Beware, this is open season for unethical insurance reps whose real purpose is to take you from your current supplemental insurance coverage, to change it to Medicare "Disadvantage," that happened to me last year at this time; it was a two month nightmare to restore my former supplemental plan back to the one that was very good to one we couldn't get our meds with, nor afford the co-pays that the so-called advantage policy offers. Talk about an oxymoron- the only advantage of this is for the insurance companies and the trolls who try to sell individuals who peddle this ADVANTAGE...NOT!

Reminder to get a flu shot with did I get a flu shot with  a yes or no answer. PLUS do I consider my health Excellent, Very good, good, etc.?  I added this to contacts vs. a blocked caller.

This call from this number, claiming to be United, happened to come in while I was at the medical center for tests and treatment, so naturally I called back and they asked about whether I had had a flu shot or not and how my health was.  I am afraid I may have given them my birthdate because I wasn't thinking clearly.  I hope it is not a scam, but it did make me feel a bit off about the call.