U.S. HealthWorks announced Monday that it has acquired three centers operated by Occupational Physician Services of Louisville in Kentucky.

The deal makes for the first U.S. HealthWorks presence in the state, bringing the total number of occupational health care centers owned by the Valencia firm to 225. A subsidiary of Dignity Health, U.S. HealthWorks now operates in 20 states.

Terms of the transactions were not disclosed.

The Kentucky center will continue to offer a wide range of occupational healthcare services, including diagnosis and treatment for injury and illness, preventive services, pre-employment and post-offer exams and screening, and return-to-work rehabilitative care, said the company in a statement to the media.

U.S. HealthWorks is one of the country’s largest operators of occupational healthcare centers with more than 3,600 employees, including about 800 medical providers.