DC: 0-3R

The Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood (DC:0-3) supports clinicians in diagnosing and treating mental health problems in the earliest years.

DC:0-3R has been revised!

The updated manual, titled DC:0-5™, is now available.

Learn More

Originally published in 1994, ZERO TO THREE’s Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood (DC:0-3) was the first developmentally based system for diagnosing mental health and developmental disorders in infants and toddlers. Its diagnostic categories reflected the consensus of a multidisciplinary group of experts in early childhood development and mental health.

The revised DC:0-3 (DC:0-3R) drew on empirical research and clinical practice that occurred worldwide after 1994. DC:0-3R, published in 2005, extended DC:0-3 by incorporating empirical research and clinical practice. It supported clinicians in diagnosing and treating mental health problems in the earliest years. Specifically, DC:0-3R was designed to help mental health and other professionals:

  • Recognize mental health and developmental challenges in young children,
  • Understand how relationships and environmental factors contribute to mental health and developmental disorders,
  • Use diagnostic criteria effectively for classification and intervention, and
  • Work more effectively with parents and other professionals to develop effective treatment plans.

DC:0-3R Resources

  • Article

    Diagnostic Classification Revision Task Force

    The Diagnostic Classification Revision Task Force is updating and revising the DC:0-3R—a 3-year process that began in March 2013. The updated manual, titled DC:0-5™, is now available.

  • Series

    Decision Guidelines for Axes I, II, and V of DC:0-3R

    Chris Wright and Cherise Northcutt, in consultation with ZERO TO THREE's DC:0-3R Training Task Force, developed these Decision Guidelines for Axes I, II, and V of DC:0-3R. Clinicians may find them he…