Where do you go to file a complaint on a health insurance provider?

If it is a group health insurance plan -- through your employer -- go to your HR person or your manager. They can get in touch with the insurance broker who sold them the plan.

If it is an individual plan -- one you bought on your own -- go to the broker who sold it to you.

Failing either of those, your state may have a consumer assistance department, within its insurance regulatory bureau. Go to your state government website and search for "health insurance consumer assistance."

Good luck!