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June 29, 2021

July 2021 Release "Dark" Days for the Common Working File (CWF) Hosts

To accommodate the anticipated duration of the July 2021 release, and to ensure the completion of weekly/monthly/quarterly processing, the Common Working File (CWF) will not process claims beginning Friday, July 2, 2021 through Sunday, July 4, 2021.

What this means to you:

  • It is customary for contractors to hold claims for several days following a quarterly release. Claims that are submitted prior to the release that would have been processed through the Common Working File (CWF) on Thursday July 1, 2021 and July 2, 2021, will be held until the CGS nightly system cycle, Monday, July 6, 2021.
  • We anticipate that claims will still be processed within a normal timeframe, and these slight delays will not affect the timeliness of your payments.
  • July 2, 2021 – July 4, 2021 will be "dark days". This means that CWF transactions, deductible queries, etc., will not be available (this includes ELGA and ELGH for Part A providers). In addition, CWF will not be available on Monday, July 5, 2021, in observance of the July 4th Holiday.

While the CWF Dark Days will impact your access to ELGA and ELGH, they will not affect your ability to access beneficiary eligibility information through myCGS. In addition, the Interactive Voice Response (IVR) will be available. NOTE: myCGS and the IVR will be available but will not update during the Dark Day period.

For more information about myCGS, refer to the myCGS User Manual.


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