I tell this story every time ambulance costs come up because it might be helpful to anyone. I once lived in San Francisco in the mid-2010s. In SF, the SFFD operates the vast majority of ambulances in the city. As in, 80%+. I once had the need to go to the hospital urgently and called 911. The ambulance that showed up was SFFD. They transported me and I recovered safely. I then got a bill from them saying that my insurance had refused to pay for it - apparently that insurance company (they're lucky I've forgotten which one, as naming and shaming health insurance people is one of my favorite hobbies) had refused to contract with SFFD, making them "out of network." Yes, an out of network ambulance. And remember, there's at least an 80% chance that an SFFD ambulance will show up, and I've never heard of them offering a menu of ambulance companies to the caller who's likely having a heart attack, bleeding, etc!

So of course, my insurance would only pay some small pittance, if anything, and I was sent a ~$1000 bill. I immediately filed a complaint with the insurance company's California regulator (at the time it was the Dept of Insurance for this one, but it seems most or all now are under the Department of Managed Health Care) since insurance companies are by law obligated to pay at the in-network rate in the case of an emergency (which presumably is why you call an ambulance in the first place). Within 2 weeks I received a letter from the insurance company that all was completely fine and that they'd corrected the situation and paid the bill.

So we have an insurance company which surely knows that law, surely knows what an ambulance is for, but has discovered the "life hack" of having an extremely inadequate network, simply refusing nearly every ambulance claim made in the City, and then only paying the small percentage who know the law and know how to file a complaint. And of course, there's no punishment, the punishment is just having to pay the few times they're caught.

And insurance companies wonder where all that anger (Delay, Deny, Depose, was it?) comes from.

Anyway, practical moral of the story: don't let them get away with doing that if it happens to you or someone you know!

Note: My story is obviously kind of tangential to the actual article which explains why the cost is so high due to everyone who's being subsidized by what they're charging privately-insured patients. However, I have but the world's tiniest violin for those extremely profitable insurance companies who would obviously really like one of their costs of doing business to just go away. Yeah, I'd also like it if I could be paid my full salary, even though I refuse any work I find annoying.