A transfer, after an event insured against, or an individual's legal right to collect an amount payable under an insurance contract. For Medicare, an agreement in which a patient assigns to the physician the right to receive payment from the Medicare administrative contractor. Under this agreement, the physician must agree to accept 80% of the allowed amount as payment in full once the deductible has been met. For TRICARE, providers who accept assignment agree to accept 75% or 80% of the TRICARE allowable charge as the full fee, collecting the deductible and 20% or 25% of the allowable charge from the patient.. With other carriers, accepting assignment means that, in return for payment of the claim, the provider accepts the terms of the contract between the patient and carrier. The provider also accept the payment from the carrier as payment in full with no balance billing to the patient.