Medical Abbreviation PN: Paroxysmal Nocturnal Hemoglobinuria, Peripheral Neuropathy, Pneumonia, Psychological Nursing, Postnatal

PN is a context-dependent abbreviation with five common medical meanings:

1. Paroxysmal Nocturnal Hemoglobinuria (PNH) – Rare acquired hemolytic anemia.
2. Peripheral Neuropathy – Nerve damage outside CNS.
3. Pneumonia – Lung infection (often in nursing notes).
4. Psychological Nursing – Mental health nursing specialty.
5. Postnatal – Period after childbirth (e.g., PN day 3).

Always confirm from clinical context.