- Plug
- Plumbism 984.9
- Plummer's disease (toxic nodular goiter) 242.3
- Plummer-Vinson syndrome (sideropenic dysphagia) 280.8
- Pluricarential syndrome of infancy 260
- Plurideficiency syndrome of infancy 260
- Plus (and minus) hand (intrinsic) 736.09
- PMDD (premenstrual dysphoric disorder) 625.4
- PMS 625.4
- Pneumathemia - see Air, embolism, by type
- Pneumatic drill or hammer disease 994.9
- Pneumatocele (lung) 518.89
- Pneumatosis
- Pneumaturia 599.84
- Pneumoblastoma (M8981/3) - see Neoplasm, lung, malignant
- Pneumocephalus 348.89
- Pneumococcemia 038.2
- Pneumococcus, pneumococcal - see condition
- Pneumoconiosis (due to) (inhalation of) 505
- Pneumocystis carinii pneumonia 136.3
- Pneumocystis jiroveci pneumonia 136.3
- Pneumocystosis 136.3
