Key PointsQuestionWhat is the association between nursing home adoption of SNFists (ie, physicians, nurse practitioners, and physician assistants concentrating their practice in the nursing home or skilled nursing facility [SNF] setting) and facility-level, unplanned 30-day rehospitalization rates for patients receiving postacute care?FindingsIn this national cohort study of 4482 US nursing homes using an event study approach, facility adoption of SNFists was not associated with statistically significant changes in rehospitalization rates.MeaningThis study suggests that SNFist adoption may represent a strategy by facilities to maintain rehospitalization rates while shifting the patient case mix toward patients receiving postacute care, which typically results in higher profit margins for nursing homes.