Caller ID said only "Unknown Caller" and no message was left. I called it back and got a recording stating "Thank you for calling the hospital business office; all operators are busy." Given that I live several states and hundreds of miles from Mobile, AL and the supposed "hospital" in Mobile, AL was unidentified I can only conclude that this was some sort of scammer.
I tried calling this number back using a "disposable" TrakFone and got a recording stating, "Thank you for calling the hospital business office. Please wait for the next available operator." The "hospital" whose "business office" I'd supposedly called was not identified and I didn't hang on to see how many times that message would repeat before I gave up. Since I live in Missouri and haven't visited Alabama since picking up a load of plastic pipe in Birmingham as an OTR trucker in the late seventies I cannot imagine any legitimate reason for a hospital in that state to be calling me.
Received a call from this number. No name, just a number. They did leave a message. This is a generic billing department calling on behalf of all hospitals, not just a certain one. This is a legal caller. Of course I let it go to voicemail because I didn't recognize the number.