QN Modifier in Ambulance Transportation – you ought to know
QN modifier is used for an Ambulance service provided directly by a provider of services. Generally, for ambulance services, a 1-digit modifier is combined to form a 2-digit modifier that indicates the first digit provides info about the ambulance’s place of origin, and the second digit provides info about the ambulance’s destination. Both QM and QN modifiers are effective for Medicare.
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