Call would not tell me what the call was about or who it was from.

My robo blocked it after one ring

from united health care, wanting me to submit to some medical procedure/inspection/scan/wtf to find out if i have any diseases, infections, heart problems, enlarged prostrate, acne, etc.  i already had 2 ct scans, "oh, ct scans cant see what this procedure can"  yah?  what's the opposite of hang down?  "hang up?" yup.  i did