ICD-10-CM
- Pachydermatocele (congenital)
- Pachygyria
- Pachyonychia (congenital)
- Pad, knuckle or Garrod's
- Paget-Schroetter syndrome
- Painter's colic
- Palatoplegia
- Palilalia
- Palliative care
- Panangiitis
- Pancoast's syndrome or tumor
- Pancreolithiasis
- Pancytolysis
- PANDAS (pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections syndrome)
- Panencephalitis, subacute, sclerosing
- Panhypogonadism
- Panmyelopathy, familial, constitutional
- Panmyelosis (acute) (with myelofibrosis)
- Panneuritis endemica
- Panniculus adiposus (abdominal)
- Panophthalmitis
- Pansynostosis
- Panuveitis (sympathetic)
- PAPA (pyogenic arthritis, pyoderma gangrenosum, and acne syndrome)
- Papillomata, multiple, of yaws
- Papillomavirus, as cause of disease classified elsewhere
- Papillon-Léage and Psaume syndrome
- Papyraceous fetus
- Para-albuminemia
- Paracephalus
- Parachute mitral valve
- Paradentosis
- Paraffinoma
- Paragonimiasis
- Paramedial urethrovesical orifice
- Paramenia
- Paramolar
- Paramyloidosis
- Paramyoclonus multiplex
- Paramyotonia (congenita)
- Paraphasia
- Paraphilia
- Parasitophobia
- Paraspadias
- Paraspasmus facialis
- Parathyroid tetany
- Paratrachoma
- Paraurethral duct
- Paravaccinia NEC
- Parodontosis
- Parorexia (psychogenic)
- Parrot's disease (early congenital syphilitic pseudoparalysis)
- Parrot fever
- Parry-Romberg syndrome
- Parsonage (-Aldren)-Turner syndrome
- Particolored infant
- Parvovirus, as cause of disease classified elsewhere
- Pasini and Pierini's atrophoderma
- Past due on rent or mortgage
- Pasteurella septica
- PAT (paroxysmal atrial tachycardia)
- Paterson (-Brown)(-Kelly) syndrome or web
- Pattern, sleep-wake, irregular
- Pause, sinoatrial
- Paxton's disease