The Coding Validation Specialist (CVS), Behavioral Health / Substance Use Disorder reviews provider medical records to validate the accuracy of outpatient facility and professional behavioral health and substance use disorder (SUD) claims. This role requires specialized knowledge of psychiatric, psychotherapy, and SUD treatment coding, including DSM-5-based diagnosis coding, H-codes, and applicable CPT and HCPCS Level II codes, to ensure the accuracy of coding, billing, and documentation. The CVS reports findings, communicates results, ensures compliance with regulatory, payer, and client requirements, and maintains quality and productivity standards. This role may be filled by a licensed nurse (RN or LPN/LVN) with coding experience, or by a certified medical coder with behavioral health/SUD specialization.