- ModifierDescription
- N1Group 1 oxygen coverage criteria met
- N2Group 2 oxygen coverage criteria met
- N3Group 3 oxygen coverage criteria met
- NBNebulizer system, any type, fda-cleared for use with specific drug
- NRNew when rented (use the ‘nr’ modifier when dme which was new at the time of rental is subsequently purchased)
- NUNew equipment
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