834 Transaction Enrollment/Disenrollment:   The HIPAA-compliant transmission of an individual’s information. For Title XIX/XXI eligible individuals, the 834 is provided to ADHS/DBHS from AHCCCS, then from ADHS/DBHS to the T/RBHAs on a daily file. For a Non-Title XIX/XXI eligible individual the information is used to establish or terminate a person’s enrollment in the ADHS/DBHS behavioral health service delivery.