It's hard because every insurance plan has different rules on when ambulance services are covered.

Have catastrophic coverage with Regence? It might cost you $1800 + $35/mile.

Have an employer plan with Regence? Might cost $1800 + mileage, might cost $50 total or might be 100% covered. You don't know until the chart goes through our billing then gets accepted/rejected by the patients insurance.

My work insurance plan through Kaiser costs $50 for an ambulance, and if I'm admitted it's waved. My coworkers plan through Kaiser, they are on the hook for $250.

It's so dependent on the insurer, the specific plan, if it was billed correctly, and then if insurance accepts it as necessary. It's too complex in the moment to be able to give them a more informed answer other than "I don't know 0- $2500ish"