Supplemental Private Insurance and Pediatric Psychiatric Emergency Follow-Up

Pediatric psychiatric emergency department (ED) visits have increased globally, yet many children do not receive timely outpatient follow-up. Although South Korea provides universal health coverage through its National Health Insurance (NHI), additional financial barriers may impede the continuity of mental health care. This study examined whether supplemental private insurance is associated with improved outpatient mental health follow-up after pediatric psychiatric ED visits within a universal coverage system. A retrospective cohort study was conducted at a tertiary children’s hospital in South Korea including 520 psychiatric ED visits (480 unique patients aged <18 years) from 2016 to 2024. The primary outcome was attendance at an outpatient mental health visit within 30 days of ED discharge. Multivariable logistic regression was used to assess the association between insurance type (NHI-only versus NHI plus supplemental private insurance) and follow-up, adjusting for age, sex, clinical presentation, and prior mental health care. Overall, 53.7% of patients attended a 30-day follow-up visit. Patients with supplemental private insurance had significantly higher follow-up rates than those with NHI alone (58.8% vs. 45.5%, p = 0.019). In adjusted analysis, supplemental private insurance was independently associated with increased follow-up (adjusted odds ratio 1.50, 95% confidence interval 1.10–2.05, p = 0.02). A significant interaction was observed between insurance type and prior mental health care (pinteraction = 0.03): the insurance effect was pronounced among patients without prior outpatient mental health treatment (45.6% vs. 38.8%) but negligible among those with prior treatment (71.9% vs. 72.5%). Prior outpatient mental health treatment (adjusted odds ratio 2.00, 95% confidence interval 1.30–3.10) and suicidal presentation were also significant predictors. Even within a universal health coverage system, supplemental private insurance is associated with better outpatient follow-up after pediatric psychiatric emergencies, particularly among patients new to the mental health system. Reducing financial barriers, expanding community-based mental health services, and strengthening care coordination are essential to ensure equitable continuity of care for all children.