U.S. HealthWorks, Inc. is an American health care provider network headquartered in Valencia, California. It offers occupational health care and urgent care services, preventive care, pre-employment and post-offer exams and screening, and return-to-work rehabilitative care.As of July 2014, U.S. HealthWorks had 218 worksites in 19 states and more than 3,300 employees.U.S. HealthWorks operates as a wholly owned, for-profit subsidiary of Dignity Health.