They call continuously and when you answer they don't say anything or hang up.

I answered and they said they were Medi-Cal.  Then they asked me if I had any pain in my shoulders.  I said I didn't.  Then they asked if I experienced any Diabetic symptoms.  They claimed that they had questions about my prescriptions.  I think it was a survey, so I hung up.

The operator called regarding diabetic test results I am not diabetic and I asked where they got my number they would not tell me. After asking twice about the name of the company the caller said "Medical Service Group".

This number calls around 8 times daily ..
Now I put this number in auto reject

When I answered,  they announced themselves as a 'medical group' but declined to say which one.  Since I am on a private health plan I asked what this was regarding and they asked if I was on Medicare.  Since I am not familiar with their group and have excellent medical insurance and, once again, informed them that I have a private health plan,  they thanked me and hung up.  I ALWAYS identify quickly and hang up on those who don't respond.