- Nappy rash
- Narcolepsy
- Nasal polyps
- Nasal swab test
- Nasopharyngeal swab test
- Nausea & vomiting – adults
- Nausea & vomiting – pregnancy
- Neck pain
- Needlestick injuries
- Nerve pain
- Neural tube defects
- Neutropenia
- Newsletters
- Night sweats
- Non-invasive prenatal testing (NIPT)
- Norovirus
- Nosebleed