If a pedestrian is found at fault in an accident involving a car and pedestrian which insurance would pay the medical bills - the auto insurance or the pedestrian's health insurance?

Since Pedestrians always have the Right of Way, It is very rare if not impossible to find them at fault unless fraud or gross negligence can be established. Traditionally The drivers liability insurance will pay their medical bills. It depends on your state's laws, but typically -- and strangely enough -- you'll find that the auto insurance will cover the pedestrian's medical bills. On the other hand, if your state doesn't require you to carry medical coverage (either Medpay or PIP) on your car insurance, the pedestrian might have to go to his or her health carrier. The reasoning behind this is that, despite liability, it's against public policy to not cover the medical bills of a pedestrian hit by an automobile. If auto insurance didn't pick up those bills, it would have a cascade effect on all the medical providers and vendors who attended the pedestrian.