The caller refused to leave a message on the answering machine and did not identify themselves or the purpose of their call.  My caller ID merely shows HCA as the caller's name. Since the initials HCA can stand for many different things, that ID is about as good as saying "anonymous"... which proves that HCA (whatever it stands for) is not a legitimate business.

Note to HCA":  If you're out there, take note that I do not answer calls from unidentified organizations or individuals.  If you ever want to speak to me, you need to give me a full business name, the individual caller's name AND the purpose of the call on my answering machine.  From that, I can determine if your call has a legitimate purpose or not.  If you have a legitimate reason to be calling my home, I will pick up the call when I am given the proper information.

If you're a telemarketer or a scammer, there's no chance you'll ever get any information from me, so the best use of your time is to give up and stop bothering me at home.