- Pacemaker syndrome 429.4
- Pachyderma, pachydermia 701.8
- Pachydermatitis 701.8
- Pachydermatocele (congenital) 757.39
- Pachydermatosis 701.8
- Pachydermoperiostitis
- Pachydermoperiostosis
- Pachymeningitis (adhesive) (basal) (brain) (cerebral) (cervical) (chronic) (circumscribed) (external) (fibrous) (hemorrhagic) (hypertrophic) (internal) (purulent) (spinal) (suppurative) (see also Meningitis) 322.9
- Pachyonychia (congenital) 757.5
- Pachyperiosteodermia
- Pachyperiostosis
- Pacinian tumor (M9507/0) - see Neoplasm, skin, benign
- Pads, knuckle or Garrod's 728.79
- Paget's disease (osteitis deformans) 731.0
- Paget-Schroetter syndrome (intermittent venous claudication) 453.8
- Pain(s) (see also Painful) 780.96
- Painful - see also Pain
- Painters' colic 984.9
- Palate - see condition
- Palatoplegia 528.9
- Palatoschisis (see also Cleft, palate) 749.00
- Palilalia 784.69
