U.S. HealthWorks Medical Group, a Valencia-based provider of outpatient occupational health care services, has acquired Inland Industrial Medical Group in Ontario. The Inland Industrial center offers employers occupational health care such as injury and illness diagnosis and treatment, drug and alcohol testing, physical therapy and orthopedic services. The transaction was completed Nov. 30. No terms were disclosed. U.S. HealthWorks now operates 59 occupational medical centers in California.