Your office has received a series of claim denials from one particular insurance carrier and you do not agree with the decision.You should consider appealing the denial. Go back and review the patient's insurance card and verification formfor coverage information. The explanation of benefits (EOB) letter from the health plan is the key to payment or denial status. If the coverage language supports payment, you can write an appeal letter describing the disorder and its medical nature, and reference the coverage policy paragraph that shows how your treatment fits coverage criteria.