co–pay·ment noun \(ˈ)kō-ˈpā-mənt\
: a relatively small 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
Seen & Heard
What made you want to look up co-payment? Please tell us where you read or heard it (including the quote, if possible).