- Overfeeding and underfeeding
- Nosebleeds in children
- Neonatal sepsis
- Neonatal polycythemia
- Neonatal meconium aspiration syndrome
- Neonatal hyperbilirubinemia encephalopathy
- Neonatal hospital-acquired infection
- Neonatal hepatitis B virus infection
- Neonatal diabetes
- Neonatal chlamydial infection
- Neonatal cephalic pustulosis
- Neonatal asphyxia
- Neonatal abstinence syndrome
- Nail matrix nevus
- N-Acetylglutamate Synthase Deficiency
- Mycoplasma pneumonia