Definitions for "Birthday rule"
A rule included in some coordination of benefits provisions that specifies the manner in which benefits for dependent children are to be coordinated between two insurance plans. According to the birthday rule, benefits for dependent children will be paid by the plan of the parent whose birthday falls earlier in the year.----------[ Back
When a researcher contacts a household and says "I'd like to interview the person who last had a birthday" this is not an advertising gimmick, but a way of ensuring randomness - it assumes that people's birthdays are spread evenly across the year.
coordination of benefits regulation stipulating that the primary payer of benefits for dependent children is determined by the parents date of birth. Regardless of which parent is older, the dental benefit program of the parent whose date of birth falls first in a calendar year is considered primary. (May not apply to “self-funded” programs).