We recommend that the New York State Department of Health work with the New York State Office of Mental Health to improve monitoring activities by increasing the number of case files reviewed when conducting provider site visits to ensure that service plans and subsequent service plan reviews are timely signed and maintained, community rehabilitation claims meet Medicaid reimbursement standards, and services are appropriately authorized. We recommend that the New York State Department of Health work with the New York State Office of Mental Health to improve monitoring activities by providing formal guidance or training to providers to clarify requirements related to service plans and subsequent service plan reviews being timely signed and maintained, community rehabilitation claims meeting Medicaid reimbursement standards, and services being appropriately authorized.