Substance abuse rehab billing involves the billing and coding process for medical services provided in substance abuse rehabilitation centers. It includes capturing patient information, assigning accurate medical codes for substance abuse treatment services, and submitting claims to insurance companies or government programs for reimbursement. Substance abuse rehab billing requires expertise in coding guidelines for addiction treatment, understanding of insurance policies, and compliance with regulatory requirements. Efficient substance abuse rehab billing practices are essential for healthcare providers to receive proper reimbursement and optimize revenue in substance abuse rehabilitation settings.