Coverage is based on where transportation by any other means was not contraindicated. In other words, you could have been transported another way, like a cab, other than an ambulance. Technically, that is not a medical necessity denial. Under those an ABN is not required and is not an issue. In these situations, providers report the base rate ambulance trip and mileage as separate revenue code lines.
Providers report the base rate ambulance trip in accordance with current billing requirements.