After the intermediary has exhausted all available means of identification, and the
provider has been contacted to have their records rechecked for a possible correction
of name and/or claim number, and no new data is obtained, refer the case to the local
RRB office for their investigation. RRB will resolve the problem and notify the intermediary.
If the DO receives a code 52 reject allegation from an intermediary for a prefix claim
number, return the correspondence to the intermediary, with an an explanation that
this is a RR claim number and should be directed to the local RRB office.
NOTE: If an intermediary or beneficiary indicates a previous contact has been made with
RRB to resolve a problem and RRB has not responded or the problem still exists do
not forward the case to RRB. Instead refer it to the Medicare Bureau RO with the explanation
that RRB has been previously contacted. The CMS RO refers the case to CMS, BPO, Entitlement
Systems Branch to be handled similar to a critical case.