Provider Proficiency Guide outlines five essential domains—cognitive, communication, physical (including vision and hearing), social-emotional, and adaptive—detailing the evidence-based skills and knowledge EI professionals must master to deliver high-quality, state-compliant services. Reviewing this guide is crucial for providers to ensure consistent, effective IFSP implementation, measurable child progress, and adherence to NYS Early Intervention standards—download now to stay current and confident in your practice.