So it's like insuring a pre-exisitng condition?
Fern
Not really. I guess it's the same in that they both have premiums equal to the anticipated cost, but it's not really the same from a technical standpoint.
Here's an example:
You're a business owner with $10,000,000 in annual revenue from 10,000 customers. Your average annual revenue per customer is (obviously) $1,000. In any given year 5% of your customers would go out of business or otherwise stiff you on their bills. The average anticipated loss to bad debt would be 5%, or $500,000. If this scenario held as true then insurance on you receivables would cost ~$500,000 and there would be no incentive to purchase insurance. You could retain the risk and self-insure for the exact same cost.
Now let's say you have $10,000,000 in annual revenue from 10,000 customers but 10 customers account for $9,000,000 in sales. That means that the average annual revenue for the remaining 9,990 customers is ~$100 each. If the risk of bad debt is still 5% and the 10 large customers all contribute $900,000 each then the anticipated average loss in any year due to bad debt would be:
($9,000,000 * 0.1% * 5%) + ($1,000,000 * 99.9% * 5%) = ($450) + ($49,950) = $50,400.
So your average anticipated loss has decreased from $500,000 to $50,400. Now you run the risk that of the 500 (5%) account that go bad each year 10 of them will be your big customers.
You can insure against the risk that all 10 (or some, or one) of those 10 goes out of business using credit insurance since the sample is not homogeneous to the population and risk can be isolated, but you cannot insure against the other 9,990 since that sample is representative of the population and loss costs become certainties (i.e. there is no actuarial risk).
Hospitals' economic models function like the first example where each patient is such a proportionately small portion of the population that loss costs become certainties and insurable risk drops to zero.
Again, for anyone late to the party, this is only in regards to patients paying their bills.