I got he same message saying they were from Select Health, which is who I have my insurance through - do you have Select Health as well? They said they were reminding me of a wellness check I need to schedule since I just turned 40! :-)
Select Health is an insurance provider, so if you don't have insurance through them it would be odd that they are calling you, but I do have insurance through them and it is a legit call - just reminding people of annual appointments. :-)