CMS has updated the Medicare Program Integrity Manual to clarify that providers and suppliers have 45 days to produce documents in response to a pre-payment review Additional Documentation Request (ADR) issued by a Medicare Administrative Contractor (MAC) or Zone Program Integrity Contractors (ZPIC). MAC and ZPIC reviewers are instructed not to grant extensions to providers who need more time to comply with such requests; instead, claims must be denied if the requested documentation is not received by day 46.