Systems, methods, and devices for identifying and quantifying an employment relationship between a practitioner and a facility. A method includes identifying carrier claims processed by a practitioner for procedures performed through a facility and matching the carrier claims to the facility to generate matched claims. The method includes calculating a percentage of outpatient claims based on a percentage of office claims performed by the practitioner that did not occur at the facility. The method includes calculating a level of confidence that the practitioner is employed by the facility based on the matched claims and the percentage of outpatient claims.