Identifiers & Codes
NPI
Draft — pending verification
This reference entry has not yet been verified against its authoritative source (Original definitions; regulatory facts to be verified against CMS-0057-F (89 FR 8758) and X12/HL7 documentation). Do not rely on it for production configuration until this notice is removed.
In more depth
NPIs come in Type 1 (individual) and Type 2 (organization), and using the wrong type for a loop is a classic intake defect. Payer provider files keyed by NPI drift out of sync with reality (moves, group changes), which is why identical requests can reject at one payer and process at another.