Use of Invalid End Stage Renal Disease (ESRD) Temporary Centers for Medicare and Medicaid Services (CMS) Certification Numbers (CCN)

The CMS Regional Offices (RO) assign CCNs. No other entity has the authority to assign a CCN.
• CMS learned that ESRD Networks have issued numbers denoted as “Temporary CCNs” to non-certified ESRD facilities. These are not valid numbers. The temporary numbers were issued to enable the non-certified facilities to enter patient data into the CROWNWeb (CW) data collection system.
• CMS instructed the Networks to discontinue issuing these numbers and discontinue entering data into CW using temporary CCNs.