A Case Manager I, under general supervision and review, provides and/or arranges comprehensive community services for individuals with mental illness, intellectual/developmental disabilities, and/or substance use disorders. Services include assessment, treatment planning, coordinating, monitoring, review, and advocacy. A Case Manager I provides supportive services, crisis intervention, and mental health related education for consumers, families, and significant others, and provides on-call services. A Case Manager I completes, coordinates, and monitors agency documentation of services provided and performs related work activities as assigned.