Pediatric healthcare experts agree that the healthcare needs of children are vastly different from those of adults. This book delivers the specialized knowledge and skills needed to accurately assess children during health and illness. Comprehensive and detailed, it emphasizes the unique anatomic and physiologic differences among infants, children, and adults. The third edition features updated clinical practice guidelines, clinical decision-making, formulating differential diagnoses, and evidence-based practice. It newly addresses toxic stress and trauma-informed care and child witnesses to violent acts. Additionally, the book provides several new features facilitating quick access to key information along with new instructor and student resources. It focuses exclusively on the health history and assessment of infants, children, and adolescents and describes the unique anatomic and physiologic differences among infants, children, and adults. The book then provides comprehensive and in-depth information for APN students and new practitioners and addresses family, developmental, nutritional, and child mistreatment assessment. It also includes clinical practice guidelines for common medical conditions and incorporates up-to-date screening and health promotion guidelines. The book is divided into four units. Unit I, “The Foundations of Child Health Assessment”, comprises five chapters that provide readers with the foundational approach to health assessment of the pediatric patient. Unit II, “The Pediatric History and Physical Examination”, focuses on obtaining subjective and objective data specific to the child health examination. Unit III, “Assessment of Child Mental Health and Welfare”, includes two chapters focusing on psychosocial issues. Unit IV, “Synthesizing the Components of the Pediatric Health Assessment”, integrates the knowledge gained from all previous chapters in the text, and using this knowledge in an organized manner to conduct a full, age-appropriate, head-to-toe pediatric health examination. The unit IV also describes the clinical reasoning process for the pediatric healthcare provider.