Can mental health and substance use disorder assessments be billed more often than once per year? Let's say there was an assessment done 10 months ago by a provider but they feel that another assessment is appropriate now due to the potential change in the patient's diagnosis and health status. Would it be appropriate for the provider to bill another assessment (H0001 or H0031) before 1 year? Or is there a more appropriate re-assessment code specific to Behavioral Health?