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Update Common Working File (CWF) to modify the Indicators for Trailer Mask on Unsolicited Response (UR) or Informational Unsolicited Response (IUR)

The purpose of this change request is to notify all interested parties that CWF currently has all Trailer mask identified in one-byte value for each of the trailers to represent either the number of occurrences or type of response (in case of UR or IUR), and Trailer "24" mask has a limited number of values remaining to identify (identified as A-Z) the type of IUR to be returned to contractors.

Download the Guidance Document

Issued by: Centers for Medicare & Medicaid Services (CMS)

Issue Date: May 06, 2011

DISCLAIMER: The contents of this database lack the force and effect of law, except as authorized by law (including Medicare Advantage Rate Announcements and Advance Notices) or as specifically incorporated into a contract. The Department may not cite, use, or rely on any guidance that is not posted on the guidance repository, except to establish historical facts.