I get a call from them almost every single day. Seems like a scam to me. They say they are Kaiser but why not send me a letter in the mail then, instead of calling and leaving voicemails about non-important, non-urgent things every single day? No thank you.
I got a call from this number too. It's automated and asked me to say yes or no several times, with no real content or a clear purpose. It's very suspicious.