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co-insurance

(also coinsurance)
 
 
noun [ U] INSURANCE

Definition

a situation in which two or more insurance companies share a risk
in the US, a system of health insurance in which the patient pays a percentage of the cost of their treatment: We've also seen employers moving away from copayment to coinsurance plans.
co-insurer (also coinsurer) noun [C]
(Definition of co-insurance noun from the Cambridge Business English Dictionary © Cambridge University Press)

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