- Palilalia 784.69
- Palindromic arthritis (see also Rheumatism, palindromic) 719.3
- Palliative care V66.7
- Pallor 782.61
- Palmar - see also condition
- Palpable
- Palpitation (heart) 785.1
- Palsy (see also Paralysis) 344.9
- Paltauf-Sternberg disease 201.9
- Paludism - see Malaria
- Panama fever 084.0
- Panaris (with lymphangitis) 681.9
- Panaritium (with lymphangitis) 681.9
- Panarteritis (nodosa) 446.0
- Pancake heart 793.2
- Pancarditis (acute) (chronic) 429.89
- Pancoast's syndrome or tumor (carcinoma, pulmonary apex) (M8010/3) 162.3
- Pancoast-Tobias syndrome (M8010/3) (carcinoma, pulmonary apex) 162.3
- Pancolitis 556.6
- Pancreas, pancreatic - see condition
- Pancreatitis 577.0
- Pancreatolithiasis 577.8