- Cramp(s) 729.82
- Cranial - see condition
- Cranioclasis, fetal 763.89
- Craniocleidodysostosis 755.59
- Craniofenestria (skull) 756.0
- Craniolacunia (skull) 756.0
- Craniopagus 759.4
- Craniopathy, metabolic 733.3
- Craniopharyngeal - see condition
- Craniopharyngioma (M9350/1) 237.0
- Craniorachischisis (totalis) 740.1
- Cranioschisis 756.0
- Craniostenosis 756.0
- Craniosynostosis 756.0
- Craniotabes (cause unknown) 733.3
- Craniotomy, fetal 763.89
- Cranium - see condition
- Craw-craw 125.3
- Creaking joint 719.60
- Creeping
- Crenated tongue 529.8
- Creotoxism 005.9
