How would I file an appeal with my health insurer if my doctor was not paid?

Doctor. Your doctor's office will usually appeal directly with your insurance.
3 levels of Appeals. Based on the type of insurance, HMO, PPO, etc. or self-insured plan, there are various rules that must be followed by insurance organizations. The best place to start is to contact your state's department of insurance and get the rules to follow regarding claims appeals and service appeals. See the following web site: