Paying Claims Outside of CWF

60 - Paying Claims Outside of CWF (Rev. 4009, Issued: 03-23-18, Effective: 04-23-18, Implementation: 04-23-18) The CWF approves each claim before it is paid. However, there may be special circumstances when it is necessary to pay claims outside the CWF/CWF system. The CMS will notify the A/B MAC or DME MAC of these instances. They include, but may not be limited to: • New coverage policies are enacted by Congress with effective dates that preclude making the necessary changes to CWF timely; and, • Errors are discovered in CWF that cannot be corrected timely. All A/B MACs and DME MACs are responsible for reporting CWF problems to their host sites.