Physicians are reminded that effective March 1, 2008, all Medicare fee-for-service claims must use an NPI as the primary identifier (i.e., in the billing, pay-to, and rendering fields).
You may continue to submit NPI/legacy pairs in these fields or submit only your NPI. Claims containing only a legacy identifier in the primary fields will be rejected or returned as unprocessable.
Stay tuned to CMA Alert for additional information about the end of Medicare’s NPI contingency plan, scheduled for May 23, 2008.
Click here for more information on this issue from CMS.