I strongly recommend pet insurance for bunnies- and the only company that offers for bunnies in the US that I know of is VPI.
Rules and regulations can vary from state to state so it is best to check directly with the company. But I do know they do not cover spay/neuter, nail trims, etc. They do not cover genetic conditions (like hip dysplasia in dogs, and malocclsuon (misaligned teeth) in rabbits). But they do cover other dental issues like abcesses, etc. They also of course cover emergencies like wounds, limping, ear or eye infections, etc. VPI insurance does not work like human insurance where you have a co-pay and everything else is covered- a certain portion is covered and it is usually done by reimbursement. So you have to pay the vet bill- but you get a check mailed to you from the insurance company. But for treatment that you would be unable to decline anyway (it would break my heart to NOT ok treatment for my pets) it is worth it!
Both of my dogs are enrolled, and I work at a vet clinic. I had signed up Cotton when she was about 4 months old. Then in Oct of last year and Jan of this year I got 2 more rabbits. I had always meant to sign them up for insurance, but my husband lost his job and I thought- later, I will do it later. Well about 6 weeks or so ago- one of my bunnies was ill, seriously ill. The entire ride to the exotics vet 35 minutes away I was so angry at myself for not getting the insurance when I KNEW I should have. I was so scared that I would get an estimate for $1500 or something like that and I couldn’t NOT do it- so I would have just put it on my credit card. Unfortunately Penny died at the vet clinic. But I did not forget the horrible ride there and signed up Schroeder ASAP. So now both my bunnies have insurance. It is about $10 a month. And Cotton has had her insurance for over a year now with no claims- but if I had one claim with her it would most likely reimburse approximately a years worth of premiums. It is well worth it in my opinion.