STOP! M379 What you need to know

Date:   02/13/2008

For all Medicare Part B Trading Partners:

Please be advised that if you are receiving the M379 error on your Q Report, the carrier is deleting the batch / claims.
NPPES and Medicare credentialing information must match, or the crosswalk file will be incorrect, resulting in the M379 error.

Please contact Medicare and / or NPPES to verify they have the following information setup correct:

• Individual / Group NPI Number


• Tax ID Number and tax filing status
  (Please be aware that the number (SSN or Tax ID) reported in block 25 on CMS-1500 must be the same number on file with Medicare and NPPES.)


• Individual & Group Provider Numbers


• Business Name and Address

If you have changed any provider #’s, tax-id or tax filing status, business demographics, or added a provider to your group, Medicare and Infinedi must be notified.

Provider Action:

Please contact Medicare and / or NPPES to verify all your credentialing is matched correctly.