The billing hoops that ambulances jump through (ie "magic words") is nothing compared to the hoops hospitals jump through. Yes, I helped admit a patient today for "metabolic encephalopathy" because the patient ODed on the patient's Ambian. Similarly, it's not CHF, but "acute on chronic systolic/diastolic heart failure."
That's why I laugh at 90% of the "my boss is doing illegal stuff" threads. If magic words get people thrown in jail than every healthcare entity is in trouble....