Hi Trystan!
Great questions. Yes some BCBS branches will have you file with the local if billing an out of state plan, that is definitely not uncommon!
The claim mailing address for Anthem BCBS of Indiana as listed on their website is:
Anthem Blue Cross and Blue Shield of Indiana
P.O Box 105557
Atlanta, GA 30348-5557
And the contact phone number is listed as: 1-800-382-5520
Here is a link to their contact us page:
http://www.anthem.com/wps/portal/ahpfep?content_path=fep/noapplication/f6/s1/t0/pw_a129791.htm&label=Contact+UsAs far as the Blue Card Program, here is a link that explains what it is, how to identify a bluecard member, claim mailing address, and contact information:
http://www.anthem.com/wp...d%20Program&state=ohHope this helps, please let us know if you have any further questions!