AK9-A | Functional Group Accepted

AK9 is the Functional Group Response Trailer. The AK901 element contains a “Functional Group Acknowledge Code” that indicates whether the receiver accepted or rejected the functional group after syntax checking. Code “A” means accepted.

This is a structural checkpoint for the group, not a statement that individual claims are valid or payable. Claim-level acceptance/rejection is usually communicated later (e.g., 277CA) and payment/denials come later (e.g., 835).