1. Practice of billing for the same medical service more than once. In the Medicare program, a physician who repeatedly submits duplicate claims may be removed from the electronic billing network. 2. Resubmission of identical insurance claims with no changes. Duplicate claims are considered fraudulent. Also called double billing .

Query form completed to an insurance company or medical provider to find out where there is other health insurance coverage under another plan. Such inquiries are made for the purpose of coordination of benefits between the two or more plans.

Insurance coverage of an insured under two or more policies who collects, or may collect, payments for the same hospital, or medical expenses from more than one insurer. Also known as dual coverage, duplication of benefits , or multiple coverage .