- Pericholecystitis (see also Cholecystitis) 575.10
- Perichondritis
- Periclasia 523.5
- Pericolitis 569.89
- Pericoronitis (chronic) 523.40
- Pericystitis (see also Cystitis) 595.9
- Pericytoma (M9150/1) - see also Neoplasm, connective tissue, uncertain behavior
- Peridacryocystitis, acute 375.32
- Peridiverticulitis (see also Diverticulitis) 562.11
- Periduodenitis 535.6
- Periendocarditis (see also Endocarditis) 424.90
- Periepididymitis (see also Epididymitis) 604.90
- Perifolliculitis (abscedens) 704.8
- Perigastritis (acute) 535.0
- Perigastrojejunitis (acute) 535.0
- Perihepatitis (acute) 573.3
- Perilabyrinthitis (acute) - see Labyrinthitis
- Perimeningitis - see Meningitis
- Perimetritis (see also Endometritis) 615.9
- Perimetrosalpingitis (see also Salpingo-oophoritis) 614.2
- Perineocele 618.05
- Perinephric - see condition