- Protocoproporphyria 277.1
- Protoporphyria (erythrohepatic) (erythropoietic) 277.1
- Protrusio acetabuli 718.65
- Protrusion
- Proud flesh 701.5
- Prune belly (syndrome) 756.71
- Prurigo (ferox) (gravis) (Hebra's) (hebrae) (mitis) (simplex) 698.2
- Pruritus, pruritic 698.9
- Psammocarcinoma (M8140/3) - see Neoplasm, by site, malignant
- Pseudarthrosis, pseudoarthrosis (bone) 733.82
- Pseudo-Argyll-Robertson pupil 379.45
- Pseudo-Hurler's disease (mucolipidosis III) 272.7
- Pseudo-obstruction
- Pseudo-Turner's syndrome 759.89
- Pseudoacanthosis
- Pseudoaneurysm - see Aneurysm
- Pseudoangina (pectoris) - see Angina
- Pseudoangioma 452
- Pseudoarteriosus 747.89
- Pseudoarthrosis - see Pseudarthrosis
- Pseudoataxia 799.89
- Pseudobulbar affect (PBA) 310.8