DIAGNOSIS

The certificate holder must make a preliminary determination and document whether the client has a co-occurring substance use disorder and mental illness. The certificate holder must obtain the diagnosis or diagnoses in one of the following ways: A. document existing diagnoses determined by the referral source, if the diagnoses: (1) are determined according to the DSM; and (2) were made within the previous 180 days, and significant changes in the client's condition have not occurred; or B. perform a diagnostic assessment as defined in part 9505.0372 , subpart 1.