Received 4 calls from this number, 3 of which were on the same day. I finally answered the 3rd call and it was a guy doing a health and wellness survey from OU Medical. Stated he wasn't selling anything. I hung up and blocked the number once he identified himself.
Received a call from 405-271-0000 on my Cell Phone at 12:45 AM, they let Voice Mail answer, hung-up, and called a second time, let rang 3 times and hung up. AT 1:40 A.M. I called this number, receive a recording stating it is a number from OU Medical Center, from one of the Department or Agencies at OU Medical Center, that this number cannot be traced back whom ever called, to please follow-up with what Department or Agency you have dealing with, then it also stated each agency, but I did not write them down ... way too long. Then the recording hung-up.