Trends in the incidence, mortality, and cost of neonatal herpes simplex virus hospitalizations in the United States from 2003 to 2014.

Objective: To examine the temporal trends in the incidence and outcomes of neonatal herpes simplex infections (NHSV) in the United States.

Study Design: We conducted a retrospective study using the National Inpatient Sample (NIS). Neonates ≤28 days old with ICD-9 codes for NHSV (054.