tier

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tier

(tēr) [Fr. tire, rank, sequence]
In a health care insurance plan, one of several layers or types of care. Each level provides a different quality and quantity of service. Typically those tiers that provide the greatest number of services are the most expensive.
References in periodicals archive ?
By continuing to offer Aloha Top Tier gasoline, customers can rest assured that the gasoline they are buying meets the stringent standards for Top Tier detergent gasoline performance".