The NYS Early Intervention Competency Areas Companion Document expands upon the core competency guide by offering detailed explanations, practical examples, and strategies to support skill development across the five critical domains—cognitive, communication, physical (including vision and hearing), social‑emotional, and adaptive—essential for effective EI service delivery. Reviewing this companion guide is vital for providers to deepen their understanding, enhance evidence-based practices, ensure consistent service quality, and confidently meet NYS Early Intervention standards—download now to strengthen your professional proficiency.