ICD-10-CM
- Pectenosis
- Pedatrophia
- Pederosis
- Pediatric inflammatory multisystem syndrome
- Pedophilia
- Peg-shaped teeth
- Pel's crisis
- Pelger-Huët anomaly or syndrome
- Pelizaeus-Merzbacher disease
- Pellagra-cerebellar-ataxia-renal aminoaciduria syndrome
- Pellizzi's syndrome
- Pendred's syndrome
- Penicillosis
- Penitis
- Pentalogy of Fallot
- Pentasomy X syndrome
- Pentosuria (essential)
- Percreta placenta
- Periadenitis mucosa necrotica recurrens
- Periarteritis nodosa (disseminated) (infectious) (necrotizing)
- Periclasia
- Periepididymitis
- Perihepatitis
- Perilabyrinthitis(acute)
- Perineocele
- Periodontoclasia
- Periodontosis (juvenile)
- Periorchitis
- Periproctitis
- Perisplenitis (infectional)
- Peristalsis, visible or reversed
- Peritonsillitis
- Periureteritis
- Perivasculitis, retinal
- Perivasitis (chronic)
- Pernio, perniosis
- Perseveration (tonic)
- Petechial typhus
- Peter's anomaly
- Petrellidosis
- Peutz-Jeghers disease or syndrome
- Peyronie's disease