If the commission, the department, the Department of State Health Services, the Department of Assistive and Rehabilitative Services, or another agency funded in the General Appropriations Act under appropriations for health, welfare, and rehabilitation agencies receives funds to provide case management services to elderly persons or persons with disabilities, the agency shall provide information to its staff concerning the services other agencies provide to those populations. The agency’s staff shall use that information to develop a comprehensive service plan for its clients.