Selecting an Initial Validation Auditor (IVA) is crucial for health plans to effectively prepare for ACA commercial risk adjustment audits and avoid costly errors. Key considerations include the auditor's experience with health plan and provider claims, conflict of interest policies, risk adjustment expertise, customizable and comprehensive audit services, and understanding of fee structures. Ensuring the IVA has qualified clinical staff, relevant experience, and the ability to meet deadlines is essential for a successful audit process.