I have gotten two calls recently from this number. A voice mail message is attempted, but one was "great day!" and the other was "88-9945. Have a great day!". So it's unclear who is calling or what their incoming line is. Not going to call them back from that. I don't have the energy, or the breath.
Someone else mentioned United Healthcare. If it is them, they call me regularly for nonimportant matters. If not them, a subcontractor. We want to send a nurse to your home! Isn't that great! Well, my primary care doc is just fine, thanks. A month later, 2-3 calls: We want to send a nurse to your home! Isn't that great!