This instruction includes Stage 3 NPI Changes for Transaction 835, and Standard Paper Remittance Advice, and Changes in Medicare Claims Processing Manual, Chapter 22 - Remittance Advice.
NPIs received on claims will be cross walked to the Medicare legacy number(s) for processing. MedicareÃ•s internal provider files will continue to be based upon records established in relation to the legacy identifiers. The crosswalk may result in:
- Scenario 1: Single NPI cross walked to Single Medicare legacy number
- Scenario 2: Multiple NPIs cross walked to Single Medicare legacy number
- Scenario 3: Single NPI cross walked to Multiple Medicare legacy numbers