The National Survey of Children’s Health – Longitudinal Cohort (NSCH-LC) is sponsored by the Maternal and Child Health Bureau of the Health Resources and Services Administration, an Agency in the U.S. Department of Health and Human Services.

The NSCH-LC is a household survey conducted in 2023 and 2024. The NSCH-LC followed up with households that were interviewed for the 2018 or 2019 National Survey of Children's Health and examines the physical and emotional health of children and young adults ages 4 to 23 in the United States. The NSCH-LC collected information from parents or caregivers related to the health and well-being of the same children and young adults, including access to and use of health care, family interactions, mental health, school and after-school experiences, and family economic circumstances.

The NSCH-LC provides data to assess changes over time in the health status of U.S. children, young adults, and their families, to illuminate key risk and protective factors for this cohort, and to identify gaps in health care and education between 2018/2019 and 2024. The results of the NSCH-LC will help inform the development of federal policies and programs aimed at improving the health and well-being of children and young adults. Information is collected from parents, caregivers or previous caregivers who know about the child or young adult's health.