I agree with farmergirl - start with getting some support from your doctor. If that doesn't help, and this is an employer-sponsored health plan, get your benefits coordinator involved. They often have dedicated contacts at the insurance company and can work with them to get things resolved. Employers choose the health plans they want to offer their employees. If they have enough complaints and unresolved issues, they might decide to switch insurance companies and the insurers know this. Insurers like to keep the benefits people happy.