I provided the supplied account number and other information on my "bill."
They had no idea of who or what Lexigraph was (or what the account #'s listed on the page were).
The person I spoke to directed my to some other department where, of course, the computer systems are all "down" and no one can help me until this afternoon.
(NOTE: "Highmark Blue Shield" seems to be the "Camp Hill, PA group - not the Pittsburgh group. Yet the supplied ZIP code on the return address is Pittsburgh (15251). Also there is no phone number I can see on these letters.)