Pub. 100-20 One Time Notification: Common Working File (CWF) Duplicate Claim Edit for Referred Clinical Diagnostic and Purchased Diagnostic Services
Guidance that implements a new duplicate claim edit in the Common Working File to identify and reject claims for referred clinical diagnostic laboratory services and purchased diagnostic services submitted by physicians/suppliers when the same services are billed to more than one carrier.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: October 29, 2004
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