Medicare Claims Processing Manual (Pub. 100-04), Ch. 31 § 20.1.1
Batch Transactions
20.1.1 - Batch Transactions
(Rev. 2937, Issued; 04-25-14, Effective: 04-14-14, Implementation: 04-14-14)
Contractors must be able to accept the current ASC X12 276 claim status request in batch
mode, and respond via the ASC X12 277 claim status response in batch mode. If a
contractor currently supports batch capability in any EDI batch format to request claim
status, the response time for issuance of an ASC X12 277 claim status response
transaction in response must be within one business day of the receipt of a valid ASC
X12 276 claim status request transaction.