Beneficiary liability. The legal obligation of a beneficiary, his or her estate, or responsible family member to pay for the costs of medical care or treatment received. Specifically, for the purposes of services and supplies covered by CHAMPUS, beneficiary liability includes any annual deductible amount, cost-sharing amounts, or, when a provider does not submit a claim on a participating basis on behalf of the beneficiary, amounts above the CHAMPUS-determined allowable cost or charge. Beneficiary liability also includes any expenses for medical or related services and supplies not covered by CHAMPUS.
32 CFR § 199.2
General. In an effort to be as specific as possible as to the word and intent of CHAMPUS, the following definitions have been developed. While many of the definitions are general and some assign meaning to relatively common terms within the health insurance environment, others are applicable only to CHAMPUS; however, they all appear in this part solely for the purpose of the Program. Except when otherwise specified, the definitions in this section apply generally throughout this part.