CPT code 96113 denotes additional time for administration and interpretation of standardized developmental tests in children, billed in 30-minute increments beyond the primary testing service (96112). This code is important nationally because developmental assessments inform diagnoses, care planning, early intervention services, and authorization decisions across pediatrics and behavioral health. Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of how the code is defined and used in clinical settings, typical sites of service, common billing modifiers, and payer coverage patterns. The publication highlights benchmarks for utilization and reimbursement, recent policy clarifications that affect billing and documentation, and clinical context for when extended testing time is clinically appropriate. The analysis also outlines operational considerations for coding workflows and documentation to support claims for additional testing time. Data not available in the input is noted where relevant.