The Centers for Medicare & Medicaid services recently announced 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.

Click here for more information on this issue from CMS.

Contact: Frank Navarro, 916/551-2046 or fnavarro@cmanet.org.