Medical NPI Update: End of Dual-Use Period

Effective December 17, 2007, providers will no longer need to use both sets of identifiers on claims, as DHCS will be able to accept either an NPI only, or a Medi-Cal provider number only. Providers who are not ready to transition to using the NPI may continue to submit their Medi-Cal provider number until instructed otherwise

See the Claims Submission Update posted on Medi-Cal