You might find this article illuminating:
http://www.doctorramey.com/insure-horse/
You see, when horse health insurance was first proposed, it was supposed to be a form of protection against catastrophe. At the time, the only really expensive treatments that were routinely performed were surgeries: for colic and such. Given that most other treatments weren’t very expensive, and there weren’t a lot of expensive machines to use, policies could be conceived that essentially had a defined benefit. You paid a bit of money based on the worth of your horse (usually about 4% of his declared value), and you also got a few thousand dollars thrown in in case your horse needed life-saving colic surgery. That was a really good deal for everyone.
But now, with the advent of diagnostic machines like MRI, CT scan, and even ultrasound, as well as treatments like stem cells and platelet-rich plasma and injections of myriad substances into myriad body parts, expensive procedures are being routinely asked for and recommended for conditions that aren’t at all catastrophic. And, if a horse is insured, some people may be inclined to use them because, well, because they can, and others may be inclined to recommend them because they get paid for them. So, now, it’s possible to spend a lot of money on conditions that were previously treated with just some rest and rehabilitation, or even on conditions that can’t be treated very well at all (in hopes that they might “help”), without too much financial pain. For example, when a horse is insured, It’s possible to get a whole bunch of X-rays to evaluate a problem taken at a relatively nominal cost, and to then treat it with the latest (unproven) treatment, secure in the knowledge that it’s all been paid for. A “wait-and-see” attitude might be proposed for a horse without insurance, It’s all paid for, right?
Paid for: right. But here’s the rub. As a result of people considering insurance is an investment, equine insurance companies are losing money: Lots of it. And one thing that you can be sure of; when it comes to losing money, companies aren’t going to put up with it for long.