If you don't agree with your health plan's decision regarding a claim:
If the plan again denies the claim, read the plan's decision letter carefully. Then, check your plan's brochure again. If you still disagree with the plan's decision, the disputed claims section of the brochure will tell you how to write to the U.S. Office of Personnel Management to ask us to review the claim.
When OPM receives your claim:
You may call the Contracts Division to check on the status of your disputed claim review by dialing the telephone number provided on the acknowldgement they send you. The Contracts Division cannot give you a decision over the phone until they have completed the review and issued a written final decision.
This page can be found on the web at the following url: http://www.opm.gov/insure/archive/health/consumers/disputes.asp