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8.9.1 Modifiers on Ambulance Claims
Ambulance providers may see the HH modifier on their Remittance and Status (R&S) reports, which indicates the transfer is from a noncontracted to a contracted hospital. It does not affect claim payment or processing.
Modifier TG may be used to indicate advanced life support (ALS) services were provided when billing basic life support (BLS) procedure codes.
Modifier ET is used to denote emergency services.
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