Yes, if your claim is denied or if you believe you received insufficient benefits, you can appeal the decision. An appeal process typically involves multiple steps, starting with an informal conference at your local OWCP suboffice. If the informal conference does not result in a satisfactory resolution, you can request a formal hearing before an Administrative Law Judge (ALJ). If you are still not satisfied with the ALJ's decision, you can appeal to the Benefits Review Board and, ultimately, to the federal courts.