Who called from 8138523000

When I called the number it stated that is was not working...Name for the number on my cell phone was CORP-BAYCARE CB

i got a call it rang once and hung up, i use "mr number" on my cell phone for caller ID (Droid) and the caller id says "Ada"...???

I got a call didn't answer then when I called it immediately back, said it wasn't in service. March 13,2015

This is St Anthony's Hospital collection it would seem they left a voicemail

Legitimate. Financial assistance service\collections from the hospital for our hospital bill due.