It's collections. Mostly medical. LRMC and other providers are using this number to hide the fact that they are collecting. They do this to look like it's a cell phone or personal number. Very sneaky tactic.

I've gotten several calls from this number. Each time I would pick up, they would hang up immediately. I tried calling several times until someone answered. It appears to be a collection agency, though I couldn't get any more information out of them.

First thing they did when they answered was to ask for the debtor. Said they'd take me off the list once I explained I'm not them. I asked if they were trying to speak to the person or just harass them, but didn't get much of a response.
Finally, I asked why they called several times and hung up immediately each time. They paused for a couple of seconds, then hung up.

That number called me too. left no msg but when I called them back it says please hold and plays music.

They left no msg?!