Who called from 6123613013

Called on 2/18/15 but left no message,  Call was from Minnesota.

called 2-26 from MN no message

2-26 Caller ID says "Back and Knee"

Received call from this # 2/26; did not leave a mssg

Received a call and answered.  Recording that said they were calling to verify my eligibility for a knee brace through Medicare.  It does give you the option to press 2 to be removed from their calling list.