Most HMO policies require patients to pay a specific amount each time they visit their primary physician. What is this amount called?

A co-pay (copayment) is the fixed dollar amount patients pay at each service visit, distinct from deductibles (annual cumulative amounts) or broader out-of-pocket expenses. HMOs and other managed care plans use co-pays to discourage unnecessary care while providing predictable cost-sharing. This amount is specified in the policy and due at each physician visit.