- Ptilosis 374.55
- Ptomaine (poisoning) (see also Poisoning, food) 005.9
- Ptosis (adiposa) 374.30
- Ptyalism 527.7
- Ptyalolithiasis 527.5
- Pubalgia 848.8
- Pubarche, precocious 259.1
- Pubertas praecox 259.1
- Puberty V21.1
- Puckering, macula 362.56
- Pudenda, pudendum - see condition
- Puente's disease (simple glandular cheilitis) 528.5
- Puerperal
- Pulled muscle - see Sprain, by site
- Pulmolithiasis 518.89
- Pulmonary - see condition
- Pulmonitis (unknown etiology) 486
- Pulpitis (acute) (anachoretic) (chronic) (hyperplastic) (putrescent) (suppurative) (ulcerative) 522.0
- Pulpless tooth 522.9
- Pulse
- Pulseless disease 446.7
- Pulsus
