co-payment
co–pay·ment
noun \ˈkō-ˌpā-mənt, ˌkō-ˈ\Definition of CO-PAYMENT
: a fixed fee required by a health insurer (as an HMO) to be paid by the patient at the time of each office visit, outpatient service, or filling of a prescription
See First Known Use of CO-PAYMENT
1975
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