OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has affirmed the financial strength ratings (FSR) and issuer credit ratings (ICR) of the core insurance subsidiaries of Anthem, Inc. (Anthem) (Indianapolis, IN) [NYSE:ANTM]. The outlook for all ratings is stable. (See link below for a detailed listing of the companies and ratings.) Concurrently, A.M. Best has affirmed the ICR and debt ratings of “bbb+” of Anthem, and the debt rating of “a-” on the existing surplus notes of Anthem Insurance Companies, In